Compress a video
Shrink a video so it’s easy to send or store. Pick how small, keep it watchable, and nothing is uploaded.
Sealed on this device
Runs in your browser. Nothing is uploaded.
Sealed
Your video
Your browser can’t play this format, but the file can still be processed.
Result
- Original
- New file
- Saved
How it works
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Add your video
Drop a video or choose one from your device. It is opened in your browser and never uploaded.
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Choose the level
Pick light, medium or strong compression and, if you like, a smaller resolution such as 720p.
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Compress and download
Follow the progress, compare the sizes before and after, then download your MP4.
Frequently asked questions
Is my video uploaded anywhere?
No. The compression runs inside your browser with a WebAssembly version of FFmpeg. Your video stays on your device the whole time.
Which level should I choose?
Medium suits most videos. Choose light when quality matters most, and strong when the file must be as small as possible, for example to send it by email. Lowering the resolution to 720p or 480p saves even more space.
Why is my compressed video larger than the original?
Some videos are already heavily compressed. Re-encoding them at a light level can produce a bigger file. Try the strong level or a lower resolution, or keep the original.
What format is the compressed video?
An MP4 file with H.264 video and AAC sound, which plays on almost every phone, computer, TV and website.
How long does it take?
It depends on the length and resolution of the video and on your device. The browser can’t use the graphics chip’s video encoder, so a long 4K video can take a while. A computer with several cores is much faster than a phone.
Which open-source software does this tool use?
It uses FFmpeg compiled to WebAssembly by the ffmpeg.wasm project, with the x264 encoder. Its core is licensed under the GPL, and its full source code is available from that project.