- No uploads
- No sign-up
- No watermarks
Free online tools that run in your browser
Convert, compress and edit your files without handing them to a server. Every tool here is an ordinary web page that does its work on your own device, so there is nothing to upload, no queue to wait in and no file size cap to run into. Free to use, and no account is needed.
409 tools across 9 categories, plus 18 guides on choosing between them.
Results appear as you type. Use the up and down arrow keys to move through them, Enter to open one, Escape to close.
Featured
Start here
Hand-picked rather than ranked: at least one tool from every category, starting with the jobs people usually arrive already wanting done.
- Compress PDF
Compress PDF files in your browser with strong image compression or a lossless clean-up. Before and after sizes shown. Free, private, no upload.
- Merge PDF Files
Combine several PDF files into one document in your browser. Free, no upload, no size limits, no watermarks, and mixed page sizes are kept.
- Compress Video
Re-encode an MP4 with x264 in your browser using CRF presets tuned for email, WhatsApp and Discord. Free, private, no upload, no watermark, no sign-up.
- Convert MP4 to GIF
Turn short MP4 clips into animated GIFs right in your browser. Free and private, with no upload, no watermark, plus frame rate and size controls.
- Compress Images
Compress JPG, PNG and WebP images with a quality setting and optional downscaling. Free and private, no upload, no watermark, batch support.
- Remove Background from Image
Remove the background from a photo using an on-device AI model, right in your browser. Free, batch support, no upload, no watermark.
- Convert Video to MP3
Extract MP3 audio from MP4, MOV, MKV, WEBM, AVI, 3GP and MTS video in your browser. Free and private, with no upload and no size limit.
- Word Counter
Count words, characters with and without spaces, sentences and paragraphs, plus reading time at a speed you set. Runs entirely in your browser.
- JSON Formatter & Validator
Pretty-print JSON with the indent width you pick, or strip it back to a single line. The text is parsed and rebuilt, so what returns is a normalized copy.
- Percentage Calculator
Three percentage questions in one box. X percent of Y, X is what percent of Y, and the change from A to B. Arithmetic runs in your own browser.
- QR Code Generator
Turn a URL or any text into a PNG QR code from 100 to 1000 pixels, with four error correction levels. Drawn in your browser, so nothing is logged.
- Typing Speed Test
Take a 1, 3 or 5 minute typing test with live per-character feedback, net WPM, accuracy and a local results history. No account and nothing uploaded.
The catalog
Browse every category
Each band shows the tools the rest of the site links to most in that category. Follow the heading to see the full list, with its own search box.
Convert, compress and edit video files
- Trim Video
Cut a video to a start and end time in your browser. A stream copy trims MP4, MOV, M4V and WEBM in seconds with no quality loss and no upload.
- Convert MOV to MP4
Convert iPhone and QuickTime MOV videos to MP4 right in your browser. Free and private, no upload, no size limit and no watermark.
- Change Video Speed
Speed up or slow down MP4, MOV, M4V and WEBM in your browser. Five presets from 0.5x to 2x, audio pitch preserved, nothing ever uploaded.
- Crop Video
Crop a video to 9:16, 1:1 or 16:9 in your browser and turn landscape footage vertical for Shorts, Reels and TikTok. Free, private, no upload.
Convert and edit audio files
- Cut MP3
Cut a section out of an MP3 in your browser. The frames inside your range are copied straight across, so there is no re-encode, no upload and no watermark.
- Convert WAV to MP3
Convert uncompressed WAV recordings to MP3 in your browser. Free and private, with no upload, no size limit and no watermark.
- Convert MP4 to MP3
Extract the audio from an MP4 video as an MP3 file, right in your browser. Free and private, with no upload, no size limit and no watermark.
- Normalize Audio Loudness
Normalize MP3, WAV, M4A, OGG and FLAC to a chosen loudness target in your browser. Two-pass loudnorm, free and private, with no upload.
Convert, compress and resize images
- Resize Images
Resize JPG, PNG and WebP images to exact pixel widths or a percentage in your browser. Free and private, no upload, batch resize, aspect ratio kept.
- Crop Images
Crop JPG, PNG and WebP photos to a square, 4:3, 16:9 or 9:16 centered frame in your browser. Free and private, no upload, batch cropping.
- Remove EXIF Data from Photos
Strip GPS location, camera model and timestamps from JPG and PNG photos in your browser. Free and private, no upload, batch support.
- Image Converter
Drop one image and convert it to PNG, JPG, WebP, GIF, AVIF or ICO. The input format is detected for you and the file is never uploaded anywhere.
Merge, split and convert PDF documents
- Convert TXT to PDF
Turn a plain .txt file into a formatted PDF right in your browser. Choose page size and font size, with automatic wrapping and pagination. Private.
- Convert JPG to PDF
Combine one or more JPG images into a single PDF in your browser. Choose page size and orientation. Free, private, no upload, no watermarks.
- Printable Calendar Generator
Build a printable month or full year calendar PDF for any year from 1 to 9999, in A4 or Letter, portrait or landscape, with an optional notes column.
- Convert PDF to JPG
Turn every PDF page into a JPG image right in your browser. Free and private, no upload, no watermark. Multi-page PDFs download as a single ZIP.
Clean up, analyze and transform plain text
- Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case or kebab-case in your browser. Nothing you paste leaves the tab.
- Markdown to HTML Converter
Turn Markdown into clean, sanitized HTML source without leaving the tab. GFM tables, task lists and code blocks are supported, and nothing is uploaded.
- Markdown Table Generator
Build a GFM Markdown table in a spreadsheet grid. Add rows and columns, set per-column alignment, paste from Excel or Sheets, and copy clean Markdown.
- Word Unscrambler
Unscramble letters into real words of every length at once, with wildcard support and sorting by length, Scrabble score or alphabet. Runs in your browser.
Encode, hash, format and validate code and data
- Text Diff Checker
Compare two blocks of text and see added, removed and changed lines or words instantly in your browser. Nothing you paste is ever uploaded.
- URL Encode
Percent-encode text or a full URL right in your browser with encodeURIComponent or encodeURI. Instant results, and nothing ever leaves your device.
- Base64 Encode
Encode text to Base64 in your browser with correct UTF-8 handling for emoji and accents. Instant results, and nothing you paste ever leaves the page.
- Nginx & .htaccess Config Generator
Build Nginx or Apache .htaccess rules for HTTPS and www redirects, security headers, gzip and caching, SPA routing and a custom 404 page. No round-trip.
Everyday math, date and unit calculators
- Unit Converter
Convert length, weight, temperature, volume, area and speed against exact defined constants, with a quick reference line for the one unit case.
- Unix Timestamp Converter
Convert a Unix timestamp to a readable date, or a date back to epoch seconds/milliseconds, instantly in your browser, nothing uploaded.
- BMI Calculator
Calculate your BMI from height and weight in metric or imperial units, and see the WHO category plus the healthy weight range for that height.
- Days Between Dates Calculator
Count the exact days between two dates, with a years and months breakdown and a weekday count, or find the date a number of days before or after another.
QR codes, palettes, gradients and other creative generators
- CSS Gradient Generator
Build linear, radial and conic CSS gradients visually, with a live preview, one-line copyable CSS and a PNG export up to 4000px. Free, no sign-up.
- Color Palette Generator
Generate 5-color palettes with random, complementary, analogous or triadic harmony, lock the swatches you like, and export HEX, CSS variables or a PNG.
- Flashcard Maker
Build flashcard decks in your browser, study them with flip, shuffle or Leitner boxes, import or export CSV and JSON, and print a numbered PDF.
- Lorem Ipsum Generator
Generate lorem ipsum placeholder text in your browser. Pick paragraphs, sentences or words, set a count from 1 to 1000, and copy the result in one click.
Timers, typing tests and hardware diagnostics
- Online Timer & Stopwatch
A free countdown timer and stopwatch that survives a background tab, with a synthesised alarm, fullscreen clock and 5, 10, 25 and 60 minute presets.
- Keyboard Tester
Press keys and watch a 63-key on-screen layout light up. Read the code and key values, count how many keys are held at once, catch a stuck key.
- Countdown to Date
A free live countdown to any date or event, with days, hours, minutes and seconds, a fullscreen mode, and a shareable link. Runs in your browser.
- Mouse Tester
Check all five mouse buttons, scroll wheel direction and delta, double-click intervals and an estimated polling rate, live in your browser.
Reading
Guides, newest first
In-depth explanations of how a format or a codec actually behaves, plus one long comparison per category: what each tool is for, which one to reach for first, and where they overlap.
Audio
Lossless vs Lossy Audio: What Is Thrown Away, and Can You Hear It
What a psychoacoustic encoder actually removes, why re-encoding a lossy file compounds the damage, and how to pick a bitrate you will not regret.
Updated
Video
Resolution vs Bitrate: Which One Is Making Your Video Look Bad
Why a 4K file can look worse than a 720p one at the same size, what a bitrate actually buys, and how to tell which of the two is failing you.
Updated
Image
What DPI Actually Means (And Why Resizing Does Not Change It)
A print shop asks for 300 DPI and your file has none of that information. What the number really is, where it lives in the bytes, and when it matters.
Updated
Image
PNG vs JPG vs WebP vs AVIF: Picking a Format by Content
Four formats, two different models of a picture. Which suits photos, screenshots, logos and transparency, and why the newest is not automatically the best.
Updated
PDF
PDF/A vs PDF: Archival Formats Explained
Why an archive rejects an ordinary PDF. What PDF/A forbids, what the parts and conformance levels mean, and which everyday PDF edits quietly break it.
Updated
Developer Tools
How Client-Side File Processing Works (And Why It Is Private)
What really happens to a file you drop on a web page that never uploads it: the File handle, the WebAssembly codec, and what does cross the network.
Updated
Audio
Choosing a Bitrate for Voice vs Music
Why 40 kbps is fine for a lecture and ruins a song. What a bitrate actually buys, which content survives a low one, and what to change instead.
Updated
Video
Why Video Re-encoding Loses Quality (and When It Doesn't)
Some video edits are free and some cost quality every time. What re-encoding does to the frames, and how to tell which kind of edit you are about to make.
Updated
Image
HEIC vs JPG: What Actually Changes When You Convert
HEIC and JPG both discard detail, but not the same detail. What a conversion really costs: a second lossy pass, bit depth, transparency and metadata.
Updated
How it works
Three steps, and none of them is an upload
Open a tool
Every page does one job. Open it and the tool is already sitting there, ready for a file or a block of text. Nothing to install, nothing to log into, no upload progress bar.
Your browser does the work
The processing code runs inside the tab: WebAssembly builds of ffmpeg and pdf-lib, the browser's own canvas and audio APIs, and for a handful of tools a machine-learning model that downloads once and then runs on your hardware.
Save the result
The finished file is written straight to your downloads. Because it was never sent anywhere, there is nothing to delete afterwards and no retention window to go and read.
That is the entire architecture, and it is why you will not find an upload step anywhere on this site. What does cross the network is what any web page needs: the page itself, the processing code some tools fetch on demand, and the ads that pay for the hosting. The privacy policy sets out exactly what that involves, and the about page covers who builds this and why.