🗜️ Video Compress
Reduce video file size with H.264 (MP4) encoding. Files never leave your device.
Drop a video here, or click to select
MP4 · WebM · MKV · MOV · AVI · FLV · TS
Frequently Asked Questions
Is my video uploaded to a server?
No. Compression uses FFmpeg WebAssembly running entirely in your browser. Your video never leaves your device.
Which codecs are available?
H.264, written to an MP4 file. It has the widest device and browser support of any video codec.
How do I choose quality vs file size?
Use the CRF slider — lower CRF = better quality and larger file; higher CRF = smaller file but more compression artifacts. CRF 23–28 is a good range for most uses.
How long does compression take?
Video encoding is CPU-intensive. A 1-minute 1080p video may take 1–5 minutes in-browser depending on your device speed.
Is there a file size limit?
No server-side limit. Browser memory limits apply for very large files (4 GB+ may fail on some devices).
Can I compress 4K video?
Yes, though 4K encoding will be significantly slower in-browser. Consider lowering the output resolution for faster results.
Is the tool free?
Yes, completely free. No account or watermark.