Compress a video
Re-encode to a smaller MP4 at the quality and resolution you pick.
Runs on your device — never uploaded
Drop a file here or click to browse
Accepts .mp4, .mov, .webm, .mkv, .avi, .m4v. Nothing is uploaded.
How to compress a video
- Add a video
Drop the large file.
- Pick a target
Choose a quality level and optionally cap the resolution at 1080p or 720p.
- Download
Compare sizes, preview, and save.
Frequently asked questions
Is my video uploaded?
No. FFmpeg runs as WebAssembly inside your browser tab. Nothing leaves your device.
Why does the tool take a moment to start?
The FFmpeg engine (~30 MB) downloads once on first use and is then cached on your device for instant starts later.
How long does it take?
Browser encoding is slower than native: expect roughly real-time for 720p on a laptop. Long 4K files are better trimmed first.