Compress an image, trim a video, decode a token, check what a crawler sees on your page. Most of it happens on your own computer, which is why it is fast and why there is nothing for us to store.
Almost every free tools site works the same way: you upload a file, a server somewhere does something to it, and you download the result. That is slow, it costs the site money for every file, and it means your document sits on somebody else's disk for as long as they choose to keep it.
This site is built the other way round. The image, audio, video, text and code tools here run inside the browser tab you already have open, using WebAssembly and the Canvas and Web Audio APIs. Our own build of FFmpeg is compiled into the page for the audio and video tools; the background removal and photo restoration tools run a neural network on your own graphics hardware. Nothing is transmitted, so nothing has to be trusted.
A few things genuinely cannot work that way, and those are the ones we are explicit about. A PDF over 2 MB is compressed with Ghostscript on our server, because rasterising every page of a large document in a tab will exhaust its memory. Bcrypt and Argon2 hashing has no browser implementation. Anything that inspects a live URL has to fetch that URL. Every tool in that group says so on its own page, before you give it anything.
Where a tool cannot do something honestly, it is not here. There is no backlink checker and no domain authority score on this site, because those numbers come from crawl datasets we do not have, and a page that invents them is worse than no page.
Shrink a photo before you email it, change its format, or cut the background out of it. All of these run inside your browser — the file never leaves your machine.
Compress JPG, PNG, WebP and other images without losing quality. Reduce file size while maintaining visual fidelity — free and browser-based.
Convert images between JPG, PNG, WebP, AVIF, HEIC, SVG, GIF, BMP, TIFF, ICO and more — 100% free, secure, and instant. All processing happens in your browser.
Resize images by exact pixel dimensions or percentage scale. Scale up or down while preserving quality — 100% free, secure, and instant.
Cut the subject out of a photo and get a transparent PNG back. Runs on your own device — no upload, no watermark, no sign-up, no daily limit.
Crop images online with precision. Select custom areas, use preset aspect ratios for social media, and download instantly — all in your browser.
Upscale images 2x or 4x with a real super-resolution network that runs in your browser. No upload, no watermark, no sign-up, no credits.
Trim a clip, pull the audio out of it, or compress a file that is too big to send. Built on a self-hosted FFmpeg build that runs inside the page, so nothing is uploaded anywhere.
Shrink MP4, MOV, MKV and WebM files in your browser. Choose a quality level or a target size in MB — no upload, no watermark, no sign-up.
Cut a clip out of a video with a drag-and-drop timeline. Keep a section or delete one, with an instant lossless mode and a frame-exact mode.
Extract audio from video as MP3, M4A, WAV, FLAC, OGG or Opus. Choose bitrate, sample rate and channels, with loudness normalisation — all in your browser.
Convert video between MP4, WebM, MKV, MOV, AVI and OGV in your browser. Batch up to five files, with a lossless fast path when no re-encode is needed.
Trim MP3 and other audio with a drag-and-drop waveform. Keep a section or delete one, with an instant lossless mode and optional fades.
Convert audio to and from MP3, WAV, M4A, AAC, OGG, Opus and FLAC. Batch up to ten files, with full control over bitrate, sample rate and bit depth.
Two tools that do the two things people actually need: make a PDF small enough to send, and change what is inside one without buying a licence for the privilege.
Reduce PDF file size while keeping text selectable, or use image compression for maximum reduction. 100% free, secure, and browser-based.
Edit PDF text, images, pages and annotations online. Add text, images, shapes, links, watermarks, headers/footers and more — fast, secure, and fully browser-based.
Check what your page really sends to a crawler — headers, redirects, canonical tags, structured data — and generate the markup you turn out to be missing.
Generate title, description, robots, viewport, canonical and theme-color meta tags from a simple form, with live character counts.
See exactly how your page will look in Google search results, with pixel-accurate truncation for desktop and mobile.
Generate valid JSON-LD structured data for 12 schema types — Article, Product, LocalBusiness, FAQ, Event, Recipe and more — with required fields marked.
Inspect every response header a URL returns, with a security header audit covering HSTS, CSP, X-Frame-Options and more.
Trace every hop between a URL and its final destination, with the status, timing and type of each redirect in the chain.
Build a valid robots.txt with per-crawler rules, sitemap declaration and crawl-delay. Includes presets for CMS sites and blocking AI crawlers.
Format the JSON somebody pasted at you, decode a JWT, hash a string, or generate a password you can defend. No request leaves the page for any of it.
Format, indent and optionally sort JSON, with precise error messages that point at the line and column when something is wrong.
Decode a JWT in your browser to read its header, payload and claims — with expiry dates worked out and dangerous headers flagged.
Generate strong random passwords in your browser, with the length, character types and entropy you choose — and nothing sent to a server.
Generate a SHA-256 hash of text or a file in your browser — the current standard for checksums, signatures and integrity checks.
Encode text or a file to Base64 in your browser, with URL-safe output, MIME line wrapping and ready-to-paste data URIs.
Reformat minified or tangled HTML into a clean, properly nested document, including any inline CSS and JavaScript.
Units of measurement and the everyday sums — EMI, percentages, compound interest — with the working shown underneath rather than a bare number.
Convert between 30 length and distance units — millimetres, centimetres, metres, kilometres, inches, feet, yards, miles, nautical miles and more. Instant, exact and free.
Convert between 27 weight and mass units — grams, kilograms, tonnes, ounces, pounds, stones, US and UK tons, troy weights and more. Free and instant.
Convert between Celsius, Fahrenheit, Kelvin, Rankine and four historical temperature scales. Handles the offset correctly — not just a multiplication.
Calculate your monthly EMI, total interest and total repayable for a home, car or personal loan — or work out what loan your budget supports.
Work out a percentage of a number, what percentage one number is of another, or the original figure behind a percentage — three calculators in one.
See how a lump sum or a monthly deposit grows, with yearly, quarterly, monthly or daily compounding and the effective annual rate.
The reasoning behind the tools — which image format to pick and why, what actually makes a PDF enormous, how long a password really holds up. Written to answer the question, not to fill a page.
Without Open Graph tags, every platform guesses what your page is about — and they guess badly, cache the guess, and give you no obvious way to correct it.
Read the guideIt exists to move binary data through channels that only accept text. It is not compression, it is not security, and it makes everything about a third bigger.
Read the guideEvery service has a different ceiling — 25 MB, 16 MB, 100 MB — and hitting it is not guesswork. Work backwards from the limit and the settings choose themselves.
Read the guideMostly about where files go, which is the right thing to be suspicious about.
For most tools, no. The image, audio, video, text and code tools run entirely inside your browser using WebAssembly and the Canvas and Web Audio APIs, so the file never leaves your device and there is nothing for us to store. The exceptions are named on the page that needs them: PDFs over 2 MB are compressed with Ghostscript on our server, bcrypt and Argon2 hashing has no browser implementation, and anything that inspects a URL obviously has to fetch that URL. Files sent for server-side work are deleted once the response has been returned.
No. There is no sign-up, no email wall and no daily limit on any tool. The only thing we ask an email address for is the newsletter, which is optional and entirely separate.
The tools cost very little to run precisely because they run on your computer rather than ours. The site is funded by advertising, and what running cost is left — hosting, the domain, a small server for the handful of tools that genuinely need one — is covered by that.
There is no limit we impose, but there is one your browser imposes. Browser-side processing loads the file into the tab memory, so a 4 GB video will fail on a laptop with 8 GB of RAM whatever we do. In practice video up to roughly 500 MB, and images and audio of any realistic size, are fine. When a tool runs out of memory it says so rather than quietly handing you a broken file.
It depends on the format. JPG, MP3, MP4 and lossy WebP discard information permanently, so every re-save costs a little more — which is why our compressors work from the original you gave them rather than from an already-compressed intermediate. PNG, FLAC and lossless WebP discard nothing, so compressing those is genuinely free. Each tool says which of the two it is doing.
Yes. Whatever you put into a tool stays yours and so does whatever comes out; we claim no rights over either. The one caveat is the AI background and matting tools, which use the RMBG-1.4 model under a licence that is free for non-commercial use only. That restriction is stated on those tool pages.
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