Find the tool you need.

JSON Formatter

Parse, validate, pretty-print, minify, copy, and download JSON locally.

JSON Validator

Validate JSON and show useful parsing errors without sending data anywhere.

JSON Minifier

Parse and minify valid JSON locally.

Percentage Calculator

Handle common percentage calculations with clear formulas and results.

Percentage Change Calculator

Calculate percentage increase/decrease between two values.

Average Calculator

Calculate mean plus basic count/sum statistics from a list of numbers.

Age Calculator

Calculate age/duration between dates with clear date assumptions.

Date Difference Calculator

Calculate elapsed days and calendar differences between two dates.

Time Duration Calculator

Calculate durations between times and add/subtract durations.

Discount Calculator

Calculate discount amount and final price.

Sales Tax Calculator

Calculate tax amount and total from a user-entered tax rate without assuming a jurisdiction.

Tip Calculator

Calculate tip and total with optional bill splitting.

Loan Calculator

Calculate estimated payment, total paid, and interest from principal, rate, and term with a clear informational disclaimer.

Simple Interest Calculator

Calculate simple interest and final amount.

Compound Interest Calculator

Calculate compound growth from user-supplied principal, rate, frequency, and time with a clear informational disclaimer.

Profit Margin Calculator

Calculate profit, margin, and related values from cost and revenue.

Markup Calculator

Calculate markup percentage, cost, price, and profit.

Break-Even Calculator

Calculate break-even units/revenue from fixed cost, variable cost, and selling price.

JSON Formatter

Parse, validate, pretty-print, minify, copy, and download JSON locally.

JSON Validator

Validate JSON and show useful parsing errors without sending data anywhere.

JSON Minifier

Parse and minify valid JSON locally.

PNG to JPG

Convert PNG images to JPG in the browser with adjustable JPEG quality and download the result.

JPG to PNG

Convert JPG/JPEG images to PNG locally in the browser.

WebP to PNG

Convert WebP images to PNG locally in the browser.

PNG to WebP

Convert PNG images to WebP with adjustable output quality.

JPG to WebP

Convert JPG/JPEG images to WebP with adjustable output quality.

WebP to JPG

Convert WebP images to JPG with adjustable JPEG quality.

HEIC to JPG

Convert HEIC/HEIF images to JPG entirely client-side using a locally bundled browser-compatible library.

SVG to PNG

Rasterize SVG files into PNG with selectable output dimensions.

Merge PDF

Merge multiple PDF files in a user-selected order entirely in the browser.

Split PDF

Split a PDF by page selection or ranges and download the resulting PDF files.

Archive Creator and Extractor

Create and extract ZIP, TAR, and TGZ archives locally, with folder preservation and safe path validation.

Single File Compressor

Compress or decompress individual files with gzip, Brotli, or Zstandard using browser-native streams or lazily loaded local codecs.

File Encryptor and Decryptor

Encrypt and decrypt local files with password-derived AES-GCM keys, authenticated metadata, and no uploads.

File Splitter and Joiner

Split a large file into numbered chunks of a chosen size and reassemble a complete ordered chunk set locally.

Duplicate File Finder

Find exact duplicate files in a selected folder by grouping sizes and confirming matches with local cryptographic hashes.

Folder Size Analyzer

Analyze a selected folder and visualize which subfolders and file types consume the most space without uploading names or contents.

Folder Comparison Tool

Compare two selected folder trees by relative path, size, and optional hash to report added, missing, and changed files.

Folder Inventory and Tree Exporter

Build a browsable folder tree and export a CSV or JSON inventory containing paths, sizes, types, and modification dates.

Batch File Renamer

Preview batch filename changes using replacement, numbering, case, prefix, suffix, and date rules, then download the renamed files as an archive.

File Type Detector

Identify a file's likely format from its signature bytes and compare the result with its extension and declared MIME type.

Binary File Analyzer

Inspect a local file with a paged hex view, byte-frequency chart, entropy readings, and printable-string extraction.

Binary File Diff

Compare two binary files byte by byte and navigate differing offsets with hexadecimal and text context.

Checksum Manifest Tool

Create SHA checksum manifests for multiple files or verify selected files against an existing checksum manifest entirely locally.

Text File Encoding Converter

Detect likely text encodings, preview decoding issues, and convert local text files among UTF-8, UTF-16, and supported legacy encodings.

Line Ending Converter

Inspect and convert text-file line endings among LF, CRLF, and CR while preserving the remaining file content.

Large Text File Viewer

Open, page through, and search large local text or log files in chunks without loading the entire file into memory.

CSV Viewer and Profiler

View large CSV files in a virtualized table and profile column types, missing values, unique counts, and numeric ranges locally.

CSV Cleaner

Clean CSV data by trimming fields, normalizing empty values, fixing uneven rows, and reporting malformed records before export.

CSV Column Manager

Select, rename, reorder, duplicate, or remove CSV columns and export the transformed dataset locally.

CSV Row Filter

Filter CSV rows with multiple text, numeric, date, blank-value, and regular-expression conditions in the browser.

CSV Sorter

Sort CSV records by one or more columns with explicit text, numeric, date, case, and empty-value handling.

CSV Deduplicator

Remove duplicate CSV records using selected key columns, configurable normalization, and first-or-last record retention.

CSV Merger

Append or key-join multiple CSV files with column mapping, unmatched-row reporting, and local export.

CSV Splitter

Split a CSV into downloadable files by row count, approximate output size, or the values in a selected column.

Fixed Width to CSV Converter

Define or detect fixed-width text columns, preview parsed records, and export them as correctly quoted CSV.

JSON Lines Toolkit

Validate, browse, filter, and convert newline-delimited JSON files to JSON arrays or CSV without executing their contents.

SQLite File Browser

Open a local SQLite database with browser-side WebAssembly to inspect its schema, browse tables, run read-only queries, and export results.

DBF File Viewer

Inspect dBASE DBF field definitions and records locally, choose the text encoding, and export selected data as CSV.

Parquet File Viewer

Inspect Parquet schemas, row groups, and selected records locally with a lazily loaded browser-compatible reader and CSV export.

Avro File Viewer

Read Avro object container files locally, display their schema and records, and export selected rows as JSON.

Spreadsheet Sheet Splitter

Split an XLSX workbook into separate downloadable workbooks by worksheet while preserving supported values, formulas, and styles.

Spreadsheet Workbook Merger

Combine selected worksheets from multiple XLSX files into one workbook with previewed naming-conflict handling.

Spreadsheet Formula Inspector

Inventory formulas in an XLSX workbook, group repeated patterns, flag formula inconsistencies, and export a review report.

Spreadsheet External Link Finder

Scan XLSX package relationships and formulas for external workbook links, list their locations, and produce a local audit report.

EPUB Reader

Open an EPUB locally with chapter navigation, table of contents, search, and adjustable reading controls.

EPUB Metadata Editor

Edit supported EPUB title, creator, language, publisher, identifier, date, description, and cover metadata, then save a valid copy.

Font File Inspector

Inspect local TTF, OTF, WOFF, and WOFF2 font metadata, tables, variable axes, licensing fields, and supported character ranges.

Font Subsetter

Create a smaller font containing only glyphs required by pasted text or selected Unicode ranges using a local browser/WASM subsetter.

Font Format Converter

Convert supported fonts among TTF, OTF, WOFF, and WOFF2 locally while clearly reporting unsupported font features.

EML Email Viewer

Parse an EML file locally to show headers, text and sanitized HTML bodies, MIME parts, and downloadable attachments.

MBOX Mailbox Extractor

Index a local MBOX mailbox, filter messages by common headers, and export selected messages as individual EML files.

ICS Calendar File Viewer

Parse an ICS file locally and display events, recurrence details, time zones, alarms, and validation warnings in calendar and list views.

Calendar File Merger

Merge multiple ICS calendars, detect duplicate event identifiers, choose conflict outcomes, and download one consolidated calendar.

VCF Contact File Viewer

Open vCard files locally, browse contact fields and embedded photos safely, and export selected contacts as CSV.

Contact File Merger

Combine multiple VCF files, identify likely duplicate contacts by selected fields, resolve matches, and export a consolidated vCard file.

GPX Route Viewer

Visualize GPX tracks and waypoints locally with a coordinate plot, elevation profile, distance, pace, and segment statistics.

KML and KMZ Viewer

Open KML or KMZ files locally to inspect placemarks, paths, polygons, folders, styles, and embedded assets.

GeoJSON File Viewer

Validate and render GeoJSON features locally with property inspection, bounding-box statistics, filtering, and corrected-file export.

Shapefile Viewer

Load matching SHP, SHX, DBF, and optional PRJ files locally to visualize geometry, inspect attributes, and export GeoJSON.

Subtitle Format Converter

Convert subtitle files among SRT, WebVTT, ASS, and supported plain-text formats while preserving timing and basic styling where possible.

Subtitle Timing Editor

Shift, stretch, and repair subtitle cue timings with overlap detection, frame-rate conversion, preview, and local download.

M3U Playlist Editor

Open M3U and M3U8 playlists locally to reorder entries, edit metadata and paths, remove duplicates, and export a corrected playlist.

Torrent Metadata Viewer

Decode a torrent metadata file locally to show its info hash, trackers, file tree, piece settings, creation details, and validation warnings.

HAR File Analyzer

Analyze a local HTTP Archive file for request timing, transfer size, status, domains, cache behavior, and slow-resource bottlenecks.

HAR Privacy Sanitizer

Remove or redact selected cookies, authorization headers, query values, form data, response bodies, and other secrets from a HAR file.

STL File Viewer

Preview ASCII or binary STL models locally and report dimensions, triangle count, surface area, volume, and common mesh problems.

G-code File Analyzer

Visualize common 3D-printer G-code layers locally and estimate movement distance, extrusion, print time, filament use, and temperature changes.

MIDI File Inspector

Inspect a Standard MIDI File locally with track, channel, tempo, time-signature, instrument, note-range, and event summaries.

Office Document Metadata Inspector

Inspect DOCX, XLSX, and PPTX package metadata, authorship fields, revision dates, comments, custom properties, and embedded-file listings locally.

Windows Shortcut File Inspector

Parse Windows LNK files locally to display target paths, arguments, working directories, timestamps, icon locations, and suspicious-link warnings.

Dead Pixel Test

Cycle a display through solid colors and grid patterns in fullscreen to help locate stuck, dead, or bright pixels.

Screen Uniformity Test

Show adjustable neutral and color fields in fullscreen to inspect brightness, tint, and backlight uniformity across a display.

Color Banding Test

Render precise grayscale and color ramps so users can visually check a display for banding, clipping, and crushed tones.

Motion Blur Test

Animate configurable high-contrast targets at measured speeds to help compare display motion clarity and ghosting.

Refresh Rate Test

Estimate the active display refresh rate from animation frame timing and report stability, dropped frames, and measurement confidence.

Touchscreen Tester

Visualize simultaneous touch points, pressure where available, trails, edge coverage, and missed areas on a touch display.

Keyboard Tester

Highlight pressed keys on an interactive layout and inspect key codes, modifier states, repeat events, and rollover combinations.

Mouse Input Tester

Test mouse buttons, wheel directions, double-click timing, pointer movement, and browser-reported button mappings in one surface.

Mouse Polling Rate Test

Estimate mouse event frequency from high-speed pointer samples and chart polling consistency over a selected interval.

Gamepad Tester

Display connected gamepad buttons, axes, trigger values, dead zones, and vibration support using the browser Gamepad API.

Webcam Tester

Preview a selected camera locally and inspect available resolutions, frame rates, aspect ratios, facing modes, and track controls.

Microphone Tester

Monitor microphone input locally with a level meter, waveform, clipping indicator, channel count, and short playback recording.

Speaker Channel Test

Play labeled test tones, noise, and phase checks through left, right, and supported multichannel speaker outputs.

Audio Latency Tester

Measure approximate speaker-to-microphone round-trip delay with a generated pulse and clearly explain environmental limitations.

MIDI Device Monitor

Connect to permitted MIDI hardware and display live notes, controllers, channels, velocity, clock, and system messages.

Web Serial Terminal

Open a user-authorized serial device, configure common port settings, exchange text or hexadecimal data, and export the session log.

WebUSB Device Inspector

Inspect descriptors, configurations, interfaces, endpoints, and identifiers exposed by a user-authorized WebUSB device.

WebHID Device Inspector

List collections, report descriptors, usages, and live input reports from a user-authorized WebHID device without sending commands by default.

Bluetooth GATT Explorer

Browse services and characteristics exposed by a user-selected Bluetooth Low Energy device and read permitted values locally.

Vibration Pattern Tester

Build, preview, and copy vibration timing patterns on devices and browsers that support the Vibration API.

Device Motion Visualizer

Chart live acceleration and rotation-rate readings, show sampling frequency, and export a local motion recording as CSV.

Device Orientation Compass

Visualize browser-reported device orientation as a compass and tilt model with calibration guidance and support diagnostics.

GPS Accuracy Tester

Sample permitted geolocation readings over time and chart reported accuracy, drift, altitude, speed, and fix stability.

Ambient Light Sensor Tester

Display and chart illuminance readings when the browser exposes an ambient light sensor, with clear compatibility feedback.

Screen Wake Lock Tester

Request, monitor, release, and reacquire a screen wake lock while showing visibility changes and browser support status.

Storage Quota Checker

Report browser storage usage, estimated quota, persistence status, and per-storage breakdown where supported without reading user files.

Browser Storage Speed Test

Benchmark temporary IndexedDB write and read throughput at user-selected sizes, verify data, and remove test records afterward.

CPU Benchmark

Run short configurable browser-side computation tests, report timing and consistency, and avoid claiming hardware-grade diagnostic accuracy.

WebGL GPU Benchmark

Measure browser graphics performance with adjustable WebGL scenes and report frame time, throughput, and throttling trends.

WebGL Capability Checker

Inspect available WebGL versions, limits, precision formats, compressed textures, extensions, and renderer details exposed by the browser.

Media Codec Support Checker

Check browser decoding and encoding support for selectable audio and video codec, container, resolution, bitrate, and frame-rate combinations.

Camera Code Scanner

Scan QR codes and supported one-dimensional barcodes from a live camera or local image entirely in the browser.

Display PPI Calculator

Calculate pixel density, pixel pitch, and pixels per centimeter from a display's resolution and diagonal size.

Screen Dimensions Calculator

Calculate a screen's physical width, height, area, and perimeter from its diagonal size and aspect ratio.

Display Scaling Preview

Compare how interface elements and text map from logical pixels to physical pixels at common operating-system scaling levels.

Screen Ruler Calibrator

Calibrate an on-screen ruler against a bank card or entered display dimensions, then measure objects in millimeters or inches.

Monitor Viewing Distance Calculator

Estimate practical viewing-distance ranges from screen size, resolution, pixel density, and a user-selected visual-acuity assumption.

Projector Throw Distance Calculator

Calculate image width, diagonal, or mounting distance from projector throw-ratio specifications and selected aspect ratio.

Projector Brightness Calculator

Estimate screen illuminance and foot-lamberts from projector lumens, image size, screen gain, and configurable light-loss assumptions.

Battery Runtime Estimator

Estimate device runtime from battery watt-hours or voltage and amp-hours, average load, efficiency, and usable-capacity limits.

Battery Charge Time Calculator

Estimate charging time from battery capacity, initial and target charge, charger output, conversion loss, and taper allowance.

Power Bank Output Calculator

Convert a power bank's advertised cell capacity into estimated usable USB watt-hours and device charges at selectable efficiencies.

USB Power Budget Calculator

Add connected-device power demands and compare them with configurable USB, hub, charger, and port power limits.

USB Cable Voltage Drop Calculator

Estimate cable voltage drop, delivered voltage, and power loss from conductor gauge, length, current, and connector resistance.

PoE Power Budget Calculator

Plan a Power over Ethernet switch budget from port standards, powered-device loads, cable loss allowance, and total supply capacity.

UPS Runtime Estimator

Estimate backup runtime from UPS battery specifications, equipment load, inverter efficiency, power factor, and battery aging.

Device Electricity Cost Calculator

Estimate energy use and cost for multiple devices from active power, standby power, daily schedules, and entered electricity rates.

Multi-Device Charger Planner

Allocate a charger's shared port wattage across phones, tablets, and laptops and flag combinations that exceed entered port rules.

Charger Compatibility Checker

Compare manually entered charger profiles, connector types, and device input requirements to identify safe compatible power combinations.

SD Card Speed Class Checker

Match entered camera bitrate and recording mode with SD speed classes and explain C, UHS, Video, and application ratings.

Recording Storage Calculator

Calculate video or audio recording time and file size from bitrate, duration, track count, and available storage.

Surveillance Storage Planner

Estimate storage and network throughput for multiple cameras using bitrate, recording schedule, motion duty cycle, retention, and redundancy.

RAID Capacity Calculator

Calculate usable capacity, fault tolerance, storage efficiency, and rebuild exposure for common RAID layouts and mixed drive sizes.

Print Cost Calculator

Estimate ink or toner, paper, maintenance, and electricity cost per page and per print job from user-entered yields and prices.

Printer Resolution Calculator

Calculate required image pixel dimensions, achievable print size, and effective PPI from paper dimensions and source resolution.

3D Print Filament Calculator

Estimate filament length, weight, material cost, and spool remainder from volume or length, diameter, density, and price.

Wi-Fi Channel Overlap Planner

Plot manually entered nearby 2.4, 5, or 6 GHz networks by channel width and suggest lower-overlap channel choices without scanning hardware.

Thermal Throttling Test

Run a bounded browser workload over time and chart relative performance decline that may indicate throttling, with stop and cooldown controls.

Safe Area Inset Tester

Visualize CSS safe-area insets, display cutouts, rounded corners, orientation changes, and fullscreen behavior on the current device.

Audio Format Converter

Convert local audio among supported formats such as MP3, WAV, FLAC, AAC, OGG, and Opus with selectable quality settings.

Audio Merger

Join multiple local audio files in a chosen order, add optional gaps or crossfades, and export one combined track.

Audio Splitter

Split a local audio file at multiple timestamps or into equal-duration parts and download the resulting clips.

Audio File Compressor

Reduce audio file size locally with codec, bitrate, channel, and sample-rate controls plus before-and-after estimates.

Audio Volume Changer

Raise or lower the gain of a local audio file with clipping warnings, preview, and downloadable output.

Audio Loudness Normalizer

Measure a local track and normalize it toward a selected LUFS or peak target while reporting applied gain and true-peak risk.

Audio Fade Editor

Add configurable fade-ins, fade-outs, or crossfades to local audio with curve selection and waveform preview.

Silence Remover

Detect and remove or shorten quiet sections using adjustable threshold, minimum duration, padding, and preview controls.

Audio Reverser

Reverse an entire local audio file or selected region and export the processed result without uploading it.

Audio Tempo Changer

Speed up or slow down local audio while preserving pitch, with percentage, BPM, preview, and export controls.

Audio Pitch Shifter

Shift local audio by cents, semitones, or octaves without changing its duration, then preview and export the result.

Stereo to Mono Converter

Downmix stereo audio to mono using selectable sum, average, left-only, or right-only channel handling.

Audio Channel Extractor

Extract individual channels from stereo or multichannel audio as separate mono files with labeled previews.

Stereo Channel Swapper

Swap the left and right channels of a stereo file, verify the routing with a preview, and export the corrected track.

Audio Sample Rate Converter

Resample local audio to a selected rate with duration, channel, and output-size details before download.

Audio Bit Depth Converter

Convert PCM audio between supported bit depths with optional dithering and clear output format limits.

Seamless Audio Loop Maker

Choose loop boundaries, snap to zero crossings, apply a short crossfade, and export a smoothly looping audio clip.

Audio Censor Tool

Replace selected audio regions with silence, a generated tone, or reversed audio and export the edited track locally.

Audio Metadata Editor

Inspect and edit supported title, artist, album, track, date, genre, comment, and cover-art tags in local audio files.

Podcast Chapter Editor

Create timed podcast chapters with titles, URLs, and artwork, validate their order, and export supported chapter metadata or sidecar files.

Multitrack Audio Mixer

Arrange local audio tracks on a timeline, adjust gain and pan, add fades, and render a stereo mix entirely in the browser.

Audio Equalizer

Apply a multiband equalizer to local audio with presets, per-band controls, live preview, and processed-file export.

Dynamic Range Compressor

Process local audio with threshold, ratio, attack, release, knee, and makeup-gain controls while visualizing gain reduction.

Audio Peak Limiter

Limit audio peaks to a selected ceiling with release and look-ahead controls, clipping checks, preview, and export.

Audio Noise Gate

Attenuate audio below a chosen threshold using attack, hold, release, range, and waveform preview controls.

Audio Hum Remover

Reduce mains hum and harmonics at 50 or 60 Hz with adjustable notch depth, spectrum preview, and local export.

Background Noise Reducer

Learn a noise profile from a selected region and reduce steady background noise with adjustable strength and preview.

Audio Click and Pop Remover

Detect short impulsive clicks in recordings, review flagged locations, repair selected events, and export the cleaned audio.

Stereo Width Adjuster

Narrow or widen a stereo recording using mid-side processing with mono compatibility and phase warnings.

Vocal Remover

Reduce center-panned vocals in suitable stereo tracks using local channel processing, with preview and clear limitations.

Waveform Image Generator

Render a customizable waveform from a local audio file and export it as PNG or SVG with transparent-background support.

Audio Spectrogram Generator

Create a time-frequency spectrogram from local audio with adjustable FFT size, scale, range, and image export.

Audio Loudness Analyzer

Analyze integrated, short-term, and momentary loudness plus loudness range and peaks without modifying the source file.

Audio Clipping Analyzer

Locate clipped or near-clipped samples, summarize peak levels by channel, and navigate problem regions on a waveform.

BPM Detector

Estimate the tempo of a local music file, show confidence and likely half-time or double-time alternatives, and provide tap verification.

Musical Key Detector

Estimate the musical key and mode of a local track with ranked alternatives, tuning offset, and confidence guidance.

Audio Silence and Cue Detector

Find silence boundaries and likely track breaks in long recordings, then export timestamps, cue sheets, or CSV markers.

Stereo Phase Correlation Analyzer

Measure stereo phase correlation over time with a vectorscope, mono preview, and warnings for likely cancellation.

Audio Dynamic Range Analyzer

Measure crest factor, peak-to-average range, and level distribution by channel for a local audio file.

Audio File Comparator

Align two local audio files and compare duration, levels, waveform difference, correlation, and residual audio.

Impulse Response Analyzer

Inspect an uploaded impulse response for decay time, frequency response, early reflections, noise floor, and usable trim points.

Audio Integrity Checker

Decode a local audio file to identify unreadable frames, unexpected truncation, duration mismatches, and container or stream warnings.

Tone Generator

Generate sine, square, triangle, and sawtooth tones with configurable frequency, level, duration, fades, and WAV download.

Noise Generator

Generate white, pink, brown, or filtered noise at a controlled level for playback or WAV download.

Metronome

Run a precise browser metronome with tempo, meter, subdivisions, accents, count-in, and keyboard controls.

Tap Tempo Calculator

Calculate BPM from mouse, keyboard, or touch taps with outlier handling, rolling averages, and timing stability feedback.

Instrument Tuner

Detect pitch from microphone input and show the nearest note, cents deviation, frequency, reference tuning, and input confidence.

DTMF Tone Tool

Generate keypad DTMF sequences or decode tones from local audio with timing, frequency, and confidence details.

Morse Code Audio Tool

Encode text as downloadable Morse code audio or decode clean Morse recordings with adjustable speed, tone, and spacing.

Room Mode Calculator

Calculate and plot axial, tangential, and oblique room modes from entered dimensions, units, and sound-speed assumptions.

Word Counter

Count words, characters, sentences and paragraphs instantly. Estimate reading time while you type, with no text uploads.

Character Counter

Count Unicode characters with and without whitespace, plus words and lines. Inspect text length instantly in your browser.

Sentence Counter

Estimate sentence counts as you type or paste text. See word, character and paragraph totals and understand counting limitations.

Paragraph Counter

Count non-empty paragraphs separated by blank lines. Check words, lines and other writing statistics without uploading text.

Case Converter

Change text to uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case or kebab-case locally.

Remove Duplicate Lines

Remove repeated lines with case-sensitive or case-insensitive matching. Keep their original order or sort the unique result.

Remove Extra Spaces

Collapse repeated spaces and tabs, trim line edges, and optionally reduce or remove blank lines from pasted text.

Sort Lines

Sort text lines alphabetically, in reverse alphabetical order, by numeric value or by character length. Copy or download the result.

Reverse Text

Reverse visible character clusters, whitespace-separated words or line order without uploading your text.

Find and Replace

Replace literal text once or everywhere, with optional case matching. Preserve special characters in replacement text.

Text Diff Checker

Compare two text blocks locally. See added and removed lines, line numbers and a copyable text diff with no uploads.

Lorem Ipsum Generator

Generate a chosen number of Lorem Ipsum paragraphs, sentences or words. Copy or download placeholder text for layouts.

Slug Generator

Create clean URL slugs using hyphens or underscores. Normalize Latin accents or retain Unicode letters and numbers.

Text to Binary

Encode text as space-separated 8-bit binary bytes using UTF-8. Convert Unicode text locally and copy the output.

Binary to Text

Decode complete binary bytes into UTF-8 text. Validate 8-bit groups and show clear errors for invalid bytes or encoding.

Text to ASCII

Convert ASCII text to decimal character codes from 0 to 127. See clear errors for characters outside the ASCII range.

ASCII to Text

Decode decimal ASCII codes from 0 to 127 into text. Separate codes with spaces or commas and download the result.

Text to Base64

Encode Unicode text as UTF-8 Base64 in your browser. Preserve spaces and line breaks, then copy or download the result.

Base64 to Text

Decode standard Base64 into UTF-8 text with strict padding and encoding validation. No data is uploaded.

Remove Line Breaks

Replace text line breaks with spaces, a custom separator or nothing. Join copied text locally without uploading it.

Text Line Numberer

Add sequential line numbers with a custom starting number and separator. Copy or download numbered text locally.

XML Formatter

Format XML locally with indentation, well-formedness checks, mixed-content preservation, and a downloadable UTF-8 result.

XML Validator

Check XML well-formedness in your browser, read parser errors, and copy or download a syntax-check report.

HTML Formatter

Format pasted HTML into readable source locally. View safe text output, choose indentation, and copy or download HTML.

HTML Minifier

Minify HTML locally with optional whitespace collapsing and comment removal. Preserve embedded scripts, styles, and preformatted text.

CSS Formatter

Format CSS rules, declarations, and media queries in your browser with readable indentation and local copy or download.

CSS Minifier

Remove CSS formatting and ordinary comments locally while preserving rule order, selectors, custom properties, and license comments.

JavaScript Formatter

Format JavaScript and JSX locally without executing source. Choose indentation, see parser errors, and copy or download readable code.

JavaScript Minifier

Minify JavaScript source locally with Terser, without execution, variable renaming, or code compression. Copy or download compact JavaScript.

SQL Formatter

Format SQL in your browser with SQL, PostgreSQL, MySQL, SQLite, T-SQL and BigQuery dialects.

Markdown Previewer

Preview Markdown locally with sanitized headings, lists, links, code blocks and tables. Copy or download the safe HTML.

Markdown to HTML

Convert Markdown into sanitized HTML in your browser, then copy the markup or download an HTML file.

HTML to Markdown

Convert pasted HTML into Markdown locally without executing scripts or loading embedded resources.

URL Encoder

Percent-encode UTF-8 text as a URL component, whole URL or form value with explicit encoding modes.

URL Decoder

Decode percent-encoded UTF-8 URL text, preserve whole-URL delimiters or interpret form plus signs, with clear errors.

Base64 Encoder

Encode Unicode text as UTF-8 Base64 or unpadded Base64url, entirely in your browser.

Base64 Decoder

Decode Base64 or Base64url into UTF-8 text with validation of alphabet, padding and decoded bytes.

UUID Generator

Generate random version 4 UUIDs using browser cryptography, individually or in batches of up to 1,000.

Unix Timestamp Converter

Convert Unix seconds or milliseconds to UTC dates, or ISO dates with explicit timezone offsets back to timestamps.

Regex Tester

Test JavaScript regular expressions locally with flags, match positions, capture groups and a protected background worker.

JWT Decoder

Decode JWT header and payload JSON locally. Signatures and claims are not verified or trusted.

HTML Entity Encoder

Encode HTML-sensitive characters or every Unicode character as HTML entities without uploading your text.

HTML Entity Decoder

Decode named and numeric HTML character references safely into plain text, without rendering supplied markup.

Hash Generator

Generate SHA-256, SHA-384, SHA-512 or legacy SHA-1 hashes of UTF-8 text with the browser Web Crypto API.

Cron Expression Helper

Build and explain common five-field Unix cron expressions locally, with numeric lists, ranges, steps and explicit day rules.

GPA Calculator

Calculate a credit-weighted GPA from course grade points and credits, using your school's grading scale.

Grade Calculator

Calculate your weighted course grade from category scores and percentage weights, with clear results for partial or full course weights.

Unit Price Calculator

Compare product prices per item, kilogram, or liter across package sizes and multipacks, with automatic conversion between compatible units.

Password Generator

Generate a password in your browser with secure randomness, a chosen length, and your preferred character sets.

Passphrase Generator

Create a random multi-word passphrase locally using the bundled EFF long word list, with word-count and separator controls.

QR Code Generator

Create a QR code from text or a URL in your browser. Choose image size and error correction, then download PNG or SVG.

Barcode Generator

Generate Code 128, Code 39, EAN-13, EAN-8, or UPC-A barcodes locally, validate check digits, and download PNG or SVG.

Random Number Generator

Generate random integers between inclusive bounds. Choose the result count and optionally prevent duplicates.

Random Name Generator

Generate example first names, surnames, or full-name combinations from a bundled local dataset.

Random Username Generator

Create username ideas from local word lists. Choose a word pattern, separator, and optional random digits.

Random Hex Color Generator

Generate random six-digit HEX colors, preview each swatch, and copy individual values or the whole list.

Fake Data Generator

Create clearly labeled fictional test records locally and export JSON or CSV with example names, test emails, and sample values.

Dice Roller

Roll common or custom-sided dice locally, view each roll, and calculate a total with an optional modifier.

Coin Flipper

Flip a virtual coin locally for heads or tails, or generate a batch and see the result counts.

List Randomizer

Shuffle a pasted list in your browser while preserving duplicates, blank lines, and item whitespace. Copy or download the result.

Image Compressor

Compress PNG, JPG, or WebP in your browser with quality controls. Preview the result and compare original and output file sizes before downloading.

Image Resizer

Resize a PNG, JPG, or WebP by pixel dimensions or percentage. Keep its aspect ratio or set width and height independently, then download locally.

Image Cropper

Select an image region by dragging or entering exact pixel coordinates. Preview and download the cropped PNG, JPG, or WebP without uploading.

Image Rotator

Rotate an image by 90, 180, or 270 degrees or enter a custom angle. Export the full rotated image locally with transparent or white corners.

Image Flipper

Mirror PNG, JPG, or WebP images horizontally, vertically, or both. Preview and download the flipped image at its original dimensions.

Image to Base64

Convert a local PNG, JPG, or WebP into a Base64 image data URL. Copy the result or download it as text without uploading the image.

Base64 to Image

Decode a PNG, JPG, or WebP Base64 data URL or raw Base64. Validate the image, preview it, and download the original decoded bytes locally.

Color Picker from Image

Pick exact image pixels by clicking a preview or entering coordinates. Copy HEX, RGB, and alpha values from a locally processed PNG, JPG, or WebP.

Image Metadata Viewer

Inspect image dimensions, detected type, exact file size, selected EXIF fields, and readable PNG text locally. Copy or download a metadata report.

Favicon Generator

Create 16, 32, 48, 180, 192, and 512 pixel PNG icons plus a multi-size ICO from your image. Choose centered cropping or fitting and download locally.

Social Media Image Resizer

Prepare square, portrait, story, landscape, and video-thumbnail images using practical aspect-ratio presets. Crop or fit locally and download.

Pixel Art Converter

Create a pixelated image with adjustable block size. Preview the effect and download at the original dimensions, entirely in your browser.

Grayscale Image

Convert PNG, JPG, or WebP to grayscale locally. Preserve image dimensions and preview the black-and-white result before downloading.

Blur Image

Apply adjustable whole-image blur to a PNG, JPG, or WebP in your browser. Preview the effect and download without uploading.

Delete PDF Pages

Remove unwanted pages from a PDF and download the remaining document, with local browser processing.

Extract PDF Pages

Extract selected PDF pages into one new PDF, in the order you specify, without uploading your document.

Rotate PDF Pages

Rotate selected PDF pages clockwise by 90, 180, or 270 degrees and download a new PDF.

Reorder PDF Pages

Move PDF pages up or down, or enter a complete page order, and export the rearranged PDF locally.

JPG to PDF

Convert one or more JPG or JPEG photos to a PDF, with ordering, page-size, orientation, and margin controls.

PNG to PDF

Turn PNG images into a downloadable PDF with one image per page and adjustable page size and margins.

Images to PDF

Combine still JPG, PNG, and WebP images into a single PDF with image ordering and page layout controls.

PDF to JPG

Render selected PDF pages as downloadable JPG images with adjustable resolution and image quality, entirely in your browser.

PDF to PNG

Convert selected PDF pages into sharp PNG images with adjustable resolution and individual local downloads.

Add PDF Page Numbers

Add page numbers to selected PDF pages with configurable starting number, position, margin, and font size.

Add Text Watermark to PDF

Apply a text watermark to selected PDF pages with adjustable position, font size, margin, and opacity.

Add Image Watermark to PDF

Place an uploaded JPG or PNG watermark on selected PDF pages with size, position, margin, and opacity controls.

PDF Metadata Viewer

Inspect PDF title, author, dates, producer, page count, page dimensions, crop boxes, and rotation locally.

Color Picker

Pick a color and copy its HEX, RGB, and HSL values, with an optional alpha channel.

HEX to RGB

Convert short or full HEX colors to RGB or RGBA and copy the CSS color value.

RGB to HEX

Convert red, green, and blue channel values to HEX, including opacity when needed.

HEX to HSL

Convert HEX colors to HSL or HSLA with hue, saturation, and lightness values.

HSL to HEX

Convert hue, saturation, and lightness to a HEX color, with optional opacity.

Color Palette Generator

Create five-color palettes from a base color using analogous, complementary, triadic, or shade schemes.

Random Color Generator

Generate up to 20 random sRGB colors with copyable HEX, RGB, and HSL values.

Color Contrast Checker

Check the contrast ratio between two opaque HEX colors and compare WCAG AA and AAA text thresholds.

CSS Gradient Generator

Build linear or radial CSS gradients with two or three color stops and copy the background declaration.

CSS Box Shadow Generator

Configure an outer or inset CSS box shadow and copy the declaration after previewing it.

CSS Border Radius Generator

Set each corner radius visually using pixels or percentages, then copy the CSS declaration.

Aspect Ratio Calculator

Simplify width-to-height ratios or calculate a missing dimension while preserving an aspect ratio.

PX to REM Converter

Convert pixel values to rem using your chosen root font size, including fractional and negative values.

REM to PX Converter

Convert rem values to CSS pixels using a configurable root font size.

Length Converter

Convert metric and imperial lengths, including meters, feet, inches, miles, and nautical miles.

Weight Converter

Convert mass between kilograms, grams, pounds, ounces, stones, and clearly labeled tons.

Temperature Converter

Convert absolute temperatures between Celsius, Fahrenheit, and Kelvin with clear formulas.

Area Converter

Convert square meters, square feet, hectares, acres, and other common area units.

Volume Converter

Convert liters and cubic units, plus explicitly labeled US liquid and imperial gallons, quarts, pints, and fluid ounces.

Speed Converter

Convert speeds between kilometers per hour, miles per hour, meters per second, feet per second, and knots.

Time Converter

Convert elapsed durations between nanoseconds, milliseconds, seconds, minutes, hours, days, and weeks.

Data Storage Converter

Convert bits and bytes with separate decimal kB, MB, GB and binary KiB, MiB, GiB units.

Pressure Converter

Convert pressure between pascals, kilopascals, bar, psi, standard atmospheres, and torr.

Energy Converter

Convert joules, kilojoules, watt-hours, kilowatt-hours, thermochemical calories, and IT British thermal units.

Power Converter

Convert watts, kilowatts, mechanical horsepower, metric horsepower, and IT Btu per hour.

Angle Converter

Convert angles between degrees, radians, gradians, and turns without wrapping or losing full rotations.

Fuel Economy Converter

Convert fuel consumption and economy between L/100 km, US MPG, imperial MPG, and kilometers per liter.

Data Transfer Rate Converter

Convert bit and byte transfer rates per second with explicitly labeled decimal and binary prefixes.

URL Parser

Break an absolute URL into its protocol, hostname, port, path, query and fragment without opening it.

UTM Link Builder

Create a campaign URL with encoded UTM parameters while keeping other query values and the page fragment.

Query String Parser

Decode query parameters into editable name and value pairs, preserve duplicates, and rebuild an encoded query string.

User Agent Parser

Inspect common browser, operating-system and device tokens in a pasted user-agent string using local heuristics.

Browser Information Checker

View basic browser-reported information locally, including language preferences, user agent and connection status.

Screen Resolution Checker

Check your current screen dimensions and available screen area as reported by the browser in CSS pixels.

Viewport Size Checker

See live layout and visual viewport dimensions in CSS pixels while resizing or zooming your browser.

Device Pixel Ratio Checker

Read the current devicePixelRatio and understand the relationship between device pixels and CSS pixels.

Video to GIF

Turn a short video selection into a looping GIF. Choose the time range, width and frame rate, then download it.

Video Trimmer

Cut a selected time range from a local video and download an MP4 with sound when the source has an audio track.

Audio Trimmer

Select part of a local audio file and download the trimmed sound as an uncompressed WAV file.

Meeting Agenda Builder

Build a timed meeting agenda with objectives, topics, owners, durations, breaks, and printable or copyable output.

Meeting Minutes Builder

Capture attendees, discussion notes, decisions, action items, and the next meeting date in a structured printable record.

Action Item Tracker

Track action items with owners, due dates, priorities, statuses, dependencies, filters, and local CSV or JSON export.

Decision Log Builder

Record decisions with dates, owners, context, alternatives, rationale, consequences, and searchable local export.

RACI Matrix Builder

Assign responsible, accountable, consulted, and informed roles across project tasks and flag incomplete or conflicting assignments.

Standard Operating Procedure Builder

Create a structured SOP with purpose, scope, roles, prerequisites, numbered steps, safety notes, revision history, and printable output.

Project Charter Builder

Draft a project charter covering objectives, scope, deliverables, milestones, stakeholders, assumptions, constraints, and approval fields.

Stakeholder Map Builder

Place stakeholders on an influence and interest matrix, add engagement notes, and export the map as an image or CSV.

Risk Register Builder

Log project risks, score likelihood and impact, assign owners and responses, and visualize exposure in a risk matrix.

RAID Log Builder

Maintain separate registers for risks, assumptions, issues, and dependencies with ownership, status, due dates, and export.

Work Breakdown Structure Builder

Break a project into nested deliverables and work packages, automatically number nodes, and export an outline or diagram.

Gantt Chart Maker

Create a local project timeline with tasks, dates, progress, milestones, dependencies, drag editing, and image or CSV export.

PERT Chart Maker

Map dependent project activities, enter optimistic, likely, and pessimistic estimates, and calculate the critical path locally.

Kanban Board

Organize cards in customizable drag-and-drop workflow columns with work-in-progress limits and local JSON import and export.

Eisenhower Matrix

Sort tasks into urgent and important quadrants, reorder them visually, and export a prioritized action list.

SMART Goal Builder

Turn a goal into specific, measurable, achievable, relevant, and time-bound parts with milestones and a printable summary.

OKR Planner

Define objectives and measurable key results, assign owners and confidence scores, update progress, and export an OKR sheet.

SWOT Analysis Builder

Organize strengths, weaknesses, opportunities, and threats in a four-quadrant workspace with prioritization and printable export.

PESTLE Analysis Builder

Assess political, economic, social, technological, legal, and environmental factors with impact ratings and an exportable summary.

Weighted Decision Matrix

Compare options against weighted criteria, normalize scores, test weighting changes, and export a ranked decision table.

Meeting Cost Calculator

Estimate meeting cost from attendee compensation, duration, recurrence, and optional overhead while showing each assumption clearly.

Timesheet Calculator and Exporter

Enter daily clock times and unpaid breaks, calculate regular and overtime hours using user-defined rules, and export a timesheet.

Employee Shift Scheduler

Build a weekly staff rota from availability and coverage needs, detect overlaps or uncovered periods, and print or export it.

PTO Accrual Calculator

Project paid-time-off balances from a user-defined accrual policy, starting balance, planned leave, caps, and carryover rules.

Invoice Generator

Create a printable invoice with seller and customer details, itemized charges, discounts, taxes, payment terms, and local draft storage.

Quote Generator

Prepare a customer quote with priced items, optional services, validity dates, terms, acceptance fields, and printable output.

Purchase Order Generator

Create a numbered purchase order with vendor, ship-to, line items, delivery details, approvals, totals, and print-ready output.

Expense Report Builder

Log categorized expenses, dates, currencies, tax and reimbursement status, attach receipt references, and export a report.

Petty Cash Log Builder

Track petty cash additions and spending, calculate the running balance, reconcile a cash count, and export the ledger.

Mileage Log Builder

Record business trips with dates, purposes, odometer readings or distances, user-set rates, totals, and CSV export.

Office Asset Register Builder

Catalog equipment with asset tags, serial numbers, assignees, locations, purchase details, condition, and local CSV export.

Inventory Reorder Planner

Calculate reorder points and suggested quantities from demand, lead time, safety stock, current inventory, and open orders.

Office Supply Checklist Builder

Create reusable office supply checklists with quantities, storage locations, responsible people, print layout, and CSV export.

Mailing Label Sheet Maker

Lay out pasted or CSV-imported addresses on configurable label sheets with margins, gaps, skipped positions, and print preview.

Envelope Address Printer

Position delivery and return addresses for common or custom envelope sizes with orientation, offset, and print calibration controls.

Business Card Sheet Maker

Design a simple business card and arrange duplicates on printable sheets with bleed, crop marks, spacing, and alignment controls.

Name Badge Sheet Maker

Import or enter attendee names and roles, format reusable badge layouts, and print aligned multi-badge sheets.

Desk Nameplate Maker

Create foldable desk nameplates with names, titles, optional logos, mirrored panels, trim guides, and print-ready sizing.

Sign-In Sheet Generator

Generate a printable visitor, event, training, or attendance sheet with configurable columns, privacy options, and row counts.

Room Booking Schedule Maker

Arrange room reservations on a daily or weekly grid, detect time conflicts, apply setup buffers, and print the schedule.

Office Seating Chart Maker

Place labeled desks, rooms, aisles, and employees on a snap-to-grid office plan and export it as an image.

Printable Calendar Maker

Generate monthly, quarterly, or yearly calendars with custom week starts, entered events, paper sizes, and print styling.

Weekly Work Planner

Plan weekly priorities, appointments, tasks, notes, and delegated work in a compact printable layout.

Time Blocking Planner

Drag tasks onto a configurable workday timeline, detect overlaps, calculate scheduled focus time, and export the plan.

Pomodoro Focus Timer

Run configurable focus and break intervals with accessible alerts, session counts, pause controls, and local daily history.

Meeting Timer

Time agenda segments with planned versus actual duration, overruns, speaker cues, and an exportable timing summary.

Presentation Timer

Rehearse a presentation with slide or section checkpoints, elapsed and remaining time, visual cues, and rehearsal comparisons.

Email Signature Generator

Build a restrained email signature from contact details and optional logo, preview common layouts, and copy safe HTML or plain text.

Out of Office Message Builder

Compose a clear absence reply from dates, availability, alternate contacts, audience, and tone without using external services.

Mail Merge Preview and Export

Merge a text or HTML template with CSV records, preview missing fields, and download personalized files locally.

Letterhead Maker

Design reusable print-ready letterhead with organization details, logo placement, margins, header and footer, and paper-size controls.

Fax Cover Sheet Generator

Create a printable fax cover page with sender, recipient, page count, urgency, confidentiality note, and message fields.

Memo Builder

Format an internal memo with recipients, sender, date, subject, headings, attachments, and a clean print layout.

Document Cover Page Maker

Create a professional cover page with title, subtitle, author, organization, date, confidentiality label, and printable alignment.

Document Outline Builder

Arrange nested headings with drag-and-drop reordering, automatic numbering, notes, collapse controls, and outline export.

Organization Chart Maker

Build a reporting hierarchy from entered people or CSV data, rearrange positions, and export a printable organization chart.

Recurring Date List Generator

Generate dates from daily, weekly, monthly, or custom recurrence rules with exclusions and CSV or ICS download.

Time Zone Meeting Planner

Compare working hours across selected IANA time zones and dates, including daylight-saving changes, to find overlapping meeting windows.

CSV Pivot Table Builder

Turn a local CSV into a pivot table using selectable rows, columns, filters, and aggregations, then export the summarized data.

Spreadsheet Formula Builder

Assemble common spreadsheet formulas from functions, ranges, conditions, and lookups with syntax guidance and copyable output.