Compress a video
Drop an MP4, choose how small you want it, and download the compressed file. The compression runs entirely in your browser — the video never leaves your device.
About video compression
Video compression re-encodes the video at a lower quality level, reducing the amount of data needed to store each frame. The three levels — Smaller, Balanced, and Better — let you choose how much to compress. Smaller produces the tiniest file but may show more visible artefacts on fast-moving scenes; Better keeps more visual detail at the cost of a larger file. The output stays in MP4 format.
Is it private?
Yes. The compressor uses FFmpeg compiled to WebAssembly, running locally in your browser. No upload, no server, no third-party service — your videos are processed entirely on your device and are never seen by anyone else.
Frequently asked questions
- What do the compression levels do?
- The three levels — Smaller, Balanced, and Better — control how much the video is re-encoded. Smaller produces the tiniest file but may show more visible artefacts on fast-moving scenes, while Better keeps more visual detail at the cost of a larger file.
- Are my videos uploaded to a server?
- No. The compressor uses FFmpeg compiled to WebAssembly, running locally in your browser. Nothing is uploaded and your videos are never seen by anyone else.
- Is it free, and do I need an account?
- Yes, it is free with no sign-up. Drop a video, pick a compression level, and download the result.
- What format is the output?
- The output stays in MP4 format. Compression re-encodes the video at a lower quality level, reducing the amount of data needed to store each frame.