Runs on your device
Compress, convert, trim, resize and merge video, images, audio and PDFs entirely inside your browser. No upload, no watermark, no account, no file size limit.
The page opens your file and processes it on your own hardware. Check the browser's network panel, or disconnect after the page loads — the tools keep working either way.
No sign-up, no email, no logo stamped into the corner of a free-tier export, and no daily cap. There are no per-file server costs to recover.
Images finish in milliseconds. Video runs at your machine's speed rather than a shared server's, so a busy evening never slows you down.
These video tools run entirely inside the web browser using a WebAssembly build of FFmpeg. Because the processing is local, files are never uploaded to a server, there is no file size limit imposed by the service, no account is required, and no watermark is added to the output.
Make a video file smaller without a visible drop in quality.
Extract the soundtrack from a video as a plain MP3 file.
Turn a few seconds of video into a shareable animated GIF.
Keep only the section of a video you actually need.
Change a video's resolution or reshape it for a specific platform.
Remove the sound from a video without re-encoding the picture.
Fix a video that was recorded sideways or upside down.
Convert iPhone and QuickTime MOV files into universally playable MP4.
Convert web-native WebM files into MP4 that editors and phones accept.
Modernise legacy AVI files into smaller, widely supported MP4.
Convert MKV to MP4 — usually instantly, and without quality loss.
Convert video to WebM for smaller, faster-loading web pages.
These image tools run entirely inside the web browser, using the JPEG, PNG and WebP codecs the browser already ships. Because the work is local, images are never uploaded, a typical photo is processed in well under a second, there is no file size limit imposed by the service, no account is required, and no watermark is added.
Make an image file smaller without a visible drop in quality.
Hit an exact upload limit instead of guessing at a quality slider.
Shrink a folder of photos in one go and download them as a ZIP.
Scale an image down to an exact pixel width.
Put a folder of mixed sizes onto one consistent width.
Cut a photo down to the shape a profile or a post asks for.
Cut one picture into evenly sized tiles.
Join a run of screenshots into one long image.
Rescue a photo that came out dark, flat or over-saturated.
Put the edge definition back into a slightly soft photo.
Soften a whole picture, lightly or completely.
Give a picture a clean margin, or an icon some breathing room.
Turn a sideways photo upright, or mirror it.
Turn a solid or green-screen background into a transparent PNG.
Rounded corners or a circular crop, with genuinely transparent edges.
Drop the colour out of a photo — properly weighted, not averaged.
Reduce a picture to flat blocks, from a light mosaic to unrecognisable.
Put your own mark on a photo — and nobody else's.
Paint out a mark using the picture that surrounds it.
One .ico file holding every size a browser and Windows ask for.
Turn a heavy PNG into a far smaller JPG.
Convert a JPG into a lossless PNG.
The single biggest size win available to a PNG on a web page.
About a third off every photo on a page, with no visible difference.
Turn a WebP saved from the web into a universally accepted JPG.
Convert WebP to PNG and keep the transparent background.
A GIF as a clean PNG — better colour, real transparency.
A GIF as a small JPEG that any system will accept.
Convert images to WebP for far smaller files and faster pages.
The one format everything opens, from whatever you happen to have.
The format every upload form asks for, from whatever you have.
Render a vector to pixels at exactly the size you need.
Strip the location and camera details out before you publish.
Turn PDF pages into JPG or PNG images, one image per page.
Put JPG and PNG images into one PDF, one image per page.
These audio tools run entirely inside the web browser using a WebAssembly build of FFmpeg. Because the processing is local, files are never uploaded to a server, there is no length or size limit imposed by the service, no account is required, and no audio watermark or spoken tag is added to the output.
Shrink a music track or a voice recording to a fraction of its size.
Turn any audio file into an MP3 that plays on everything.
Keep just the part of a recording you actually need.
Fix a recording that is too quiet, too loud, or uneven.
Shrink an uncompressed WAV to a tenth of its size or less.
Make an iPhone voice memo or an AAC track play anywhere.
Get an uncompressed PCM file for editing or for software that demands one.
These PDF tools run entirely inside the web browser. They rearrange a document's page tree — merging, extracting, deleting and rotating pages — while copying the page content across untouched, so nothing is re-rendered and no quality is lost. Because the work is local, documents are never uploaded, no account is required, and no watermark is added.
Join several PDFs into one document, in the order you set.
Take the pages you need out of a PDF and save them as a new file.
Drop the pages you do not want and keep the rest of the document.
Turn sideways pages upright and keep the rotation in the file.
Put JPG and PNG images into one PDF, one image per page.
Turn PDF pages into JPG or PNG images, one image per page.
These developer tools run entirely inside the web browser as ordinary JavaScript: JSON formatting, Base64 and URL encoding, JWT inspection, SHA hashing, UUID generation, Unix timestamp conversion, identifier case conversion, a CSS cubic-bézier easing editor and an SVG path drawer. Nothing pasted in is transmitted, logged or stored, which matters more here than anywhere else on the site — the text a developer reaches for these tools with is routinely a token, a connection string or a production payload.
Turn a wall of JSON into something readable — or back into one line.
Turn text into Base64, with the alphabet your target expects.
Read what a Base64 string actually says.
Escape text so it survives being put in a URL.
Turn %E4%B8%AD%E6%96%87 back into something you can read.
See what is inside a token — without handing it to anyone.
Hash a string with SHA-256 and three of its relatives.
Random identifiers, generated on your own machine.
Turn 1717243800 into a date, and back again.
Rename a column of identifiers into the convention you actually need.
Drag the two control points; the dot underneath shows the easing.
Several Bézier segments, closed into one shape, out as SVG.
These maths tools run entirely inside the web browser: an expression calculator, percentage calculations in five forms, unit conversion across eight families, number base conversion, Roman numerals, numbers written out in words, scientific notation, prime factorisation, greatest common divisor and least common multiple, fraction and ratio reduction, a quadratic equation solver, permutations and combinations, circle geometry, loan repayments, compound interest, a full set of descriptive statistics, and a cryptographically seeded random number generator. Every one of them works on a whole column of values at once rather than a single sum, which is the thing a pocket calculator cannot do.
Write the sum the way you would on paper, and get every line answered.
Pick which percentage question you are asking, then answer forty of them at once.
One number, all four bases, with no rounding at any width.
Break a number down into the primes it is built from.
The greatest common divisor and least common multiple of a whole list.
One fraction, shown four ways.
Paste a column of numbers, get the whole summary.
Numbers in a range you choose, drawn fairly.
Write the unit next to the number and get every other unit back.
MCMXCIV one way, 1994 the other, a whole list at a time.
One number in four forms: decimal, scientific, engineering and E.
Both roots, the discriminant and the vertex, from the equation as written.
All four counts for n and r: ordered or not, repeats or not.
The monthly payment and what the loan costs in total, side by side.
What it grows to, what the interest is, and the effective annual rate.
1234.56 spelled out — in English words or Chinese numerals.
1920:1080 reduces to 16:9; 3:4 = 9:? solves to 12.
One measurement in, all four out.
Several Bézier segments, closed into one shape, out as SVG.
Drag the two control points; the dot underneath shows the easing.
Pick a tool
Choose from the video, image, audio and PDF tools above. Each one does a single job, with sensible defaults already selected.
Add your file
Drag it onto the box or click to browse. It stays on your device the whole time.
Download the result
Save the output. The original file is never modified.
Toolkitbar is a collection of free file tools that run inside the web browser instead of on a server. Video and audio are handled by a WebAssembly build of FFmpeg, images by the browser's own JPEG, PNG and WebP codecs, and PDFs by a page-tree editor that copies content across untouched — all executing on the visitor's own device. Because nothing is uploaded, there is no queue, no size limit imposed by the service, no account requirement and no watermark on the output.
Yes. There is no paid tier, no watermark, no daily limit and no account. The processing runs on your device, so there are no server costs to recover per file.
No. Every tool reads the file into the page and processes it locally. You can verify this by opening your browser's network panel, or by disconnecting from the internet after the page has loaded — the tools keep working. The panel does show one short message when a tool opens and another when a run finishes: those record which tool was used, so we can tell which ones work, and they contain nothing from your file.
There is no limit imposed by the service. The constraint is your device memory. Images are comfortable even at 50 megapixels; video up to roughly 500 MB is fine on a typical laptop, and phones handle less.
No. Everything runs in the browser tab. The video tools download a one-off encoder the first time you use them, which the browser then caches; the image tools download nothing at all.
Any current version of Chrome, Edge, Firefox or Safari, on desktop or mobile. The video tools additionally need WebAssembly and web workers, which all of those provide.
Yes, though memory is tighter. Image tools are quick on any modern phone. Large video files may fail where a laptop would succeed — that is a hardware limit, not a policy one.
