Video Compressor
Make videos smaller and web-ready without the quality hit.
Compress MP4 and WebM videos right in your browser using a WebAssembly build of FFmpeg (H.264 / x264). Dial in the exact quality-to-size balance with a CRF slider and export a lean, share-ready file — all processed locally on your machine.
- No watermark
- No signup
- 100% private
Drop your video here
MP4, WebM, or MOV files up to 100MB are supported for optimal browser processing.
Everything in the Video Compressor tool
Purpose-built controls that make the job fast, precise and effortless.
Adjustable CRF
A single slider trades quality for size, from near-lossless to ultra-compact.
WebAssembly FFmpeg
Industry-standard x264 compression runs entirely inside your browser.
No server uploads
Your footage is processed locally — nothing is ever uploaded or stored.
Instant preview
Play the compressed result back before you download it.
Three simple steps
Get from file to finished video compressor result in seconds.
Upload a video
Drop in an MP4, WebM or MOV file up to ~100MB for smooth browser processing.
Set compression level
Slide between high quality and small size — CRF 28 is a great default.
Download the result
Preview the output, then save your lighter MP4 in a click.
Why you'll love it
- H.264 / x264 encoding produces broadly compatible MP4 files.
- The CRF slider gives you precise control over quality vs. size.
- The FFmpeg engine downloads once, then compresses fully offline.
- Great for email attachments, messaging apps and faster uploads.
Supported formats
Input
Output
Frequently asked questions
It depends on the source and the CRF you pick. A typical phone clip can shrink 40–70% at the balanced setting with no obvious quality loss.
The tool downloads the FFmpeg WebAssembly core (~30MB) once. After that, compression runs locally with nothing to upload.
For a smooth in-browser experience we suggest videos under ~100MB. Larger files work but use more memory and time.
Yes — output is standard H.264 MP4, which plays on virtually every device, player and platform.
Suggested tools
Pair this with another tool to finish the job.
Ready to use Video Compressor?
Free, private and watermark-free. No signup required — just upload and go.