Turn a clip into a GIF, turn a GIF back into a far smaller MP4, pull the audio out of a video as MP3, or compress a video down to something you can actually send. These are the jobs people normally hand to a random converter site or install a desktop app for.
All of them run on ffmpeg compiled to WebAssembly, executing inside your browser tab — your video is never uploaded anywhere. The trade-off is an honest one: ffmpeg's core is a one-time ~32 MB download, and encoding runs at your device's speed rather than a server farm's, so long clips take a while. Each tool tells you before you start.
All video & audio tools
- Video to GIF — Turn MP4, WebM or MOV clips into GIFs — locally.
- GIF to MP4 — Convert GIFs to small, everywhere-playable MP4s.
- Audio Converter — Convert to MP3, WAV or OGG — or extract audio from video.
- Video Compressor — Shrink videos to share-friendly sizes — never uploaded.
Popular conversions
Frequently asked questions
Are my videos uploaded to a server?
No. Every tool in this category runs ffmpeg.wasm locally in your browser. The file is read straight from your disk into the tab's memory, processed there, and handed back as a download — it never travels over the network.
Why is there a 32 MB download the first time?
That's the ffmpeg WebAssembly core — the actual encoder doing the work. It downloads once and is then cached by your browser, so the second and every later visit start instantly. It's the price of not uploading your files.
How long can my video be?
There's no hard limit, but encoding happens on your CPU, so keep it sensible — short clips of a few seconds to a couple of minutes are comfortable. A ten-minute 4K file will work and will also take a long time. For GIFs in particular, shorter is better anyway.
What formats are supported?
MP4, WebM, MOV and most common containers on the input side; MP4, GIF, MP3, WAV and OGG on the output side depending on the tool. If your file opens in a browser, it will almost certainly convert.