Video Compressor

About this video compressor

This free video compressor shrinks the file size of an MP4, WebM or MOV video so it's easier to share by email, upload to a website, or send in a chat. Pick a quality, optionally lower the resolution, and it re-encodes the video to a smaller MP4 (H.264) — showing you exactly how much you saved.

Everything runs on a real video engine entirely in your browser, so your video is never uploaded to a server. Because the work happens in a background worker, you can switch to other tabs while it compresses — just keep this tab open.

How it makes videos smaller

• Quality — *High* keeps it looking great with modest savings; *Balanced* is the sweet spot for most videos; *Smallest* squeezes hardest for the tiniest file.
• Resolution — dropping a 4K or 1080p clip to 720p or 480p can cut the size dramatically, which is perfect for phone screens and messaging apps.
• The result is a standard MP4 (H.264) that plays almost everywhere.

Good to know

• It re-encodes the video, so it's best for short clips and can take a little while
• The first run downloads a one-time ~30 MB engine (then it's cached); a connection is needed once
• Already-compressed videos may not shrink much — try a lower quality or resolution
• Everything is processed on your device — nothing is uploaded

Common uses

• Make a video small enough to email or attach in a chat
• Shrink a screen recording or phone clip before uploading it to a website
• Save space by compressing videos you want to keep or archive
• Reduce a clip to fit a platform's file-size limit

How to use it

• Upload your video — click the upload area or drag and drop an MP4, WebM or MOV file
• Choose a quality — start with *Balanced*, and lower the resolution if you need a smaller file
• Compress — click Compress video; you can switch tabs while it works
• Download — check the size saved, preview the result, and save your smaller MP4

Credits

Compression is powered by ffmpeg.wasm (FFmpeg and x264, licensed under GPL-2.0).