Compress video online, without uploading it

Drop a video below and CompressEasy re-encodes it on your own device using WebCodecs, the hardware video encoder built into modern browsers. A 145 MB screen recording becomes a 24 MB MP4 in about a minute, and nothing is sent to a server. Pick High quality, Balanced or Maximum compression and download the result.

Videos up to 200 MB are compressed in your browser. Larger files, HEVC and exotic formats open in the free CompressEasy Desktop app with no size limit.

How it works

  1. Drop an MP4, MOV, WebM or MKV video into the box above (up to 200 MB).
  2. Choose High quality, Balanced or Maximum compression — encoding starts immediately in your browser.
  3. Download the compressed MP4. Nothing was uploaded.

Why it does not need an upload

Most online video compressors upload your file, queue it on a server and send it back with a watermark. CompressEasy uses the WebCodecs API instead, so your GPU does the encoding inside the tab. That means instant start, full privacy and no limits driven by our server costs.

Big savings, watchable quality

Phone and screen-recording videos are large because they use light compression. Re-encoding at a sensible bitrate typically shrinks them by 50–80% with no obvious quality loss. Balanced caps resolution at 1080p; Maximum goes to 720p for the smallest files.

Bigger than 200 MB? Still free

The browser keeps everything in memory, so we cap in-browser videos at 200 MB. For longer recordings, HEVC footage, AVI or WMV, the free desktop app runs the same workflow offline with FFmpeg and no size limit.

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Frequently asked questions

Is the video really not uploaded?

Correct. You can open your browser’s network tab while compressing: no request carries your video. Decoding, resizing and H.264 encoding all run locally through WebCodecs.

Does compressing a video reduce quality?

Re-encoding is lossy, but the presets target a bitrate where the difference is hard to see while the file gets much smaller. Choose High quality to keep full resolution, or Maximum compression for the smallest output.

Which formats and browsers are supported?

Input: MP4, MOV, WebM and MKV. Output: H.264 MP4 that plays everywhere. Works in Chrome, Edge, Opera and Safari 17+. Firefox and files over 200 MB are handled by the free desktop app.

Why is there a 200 MB limit?

The browser reads and writes the video in memory. Above roughly 200 MB, tabs on ordinary laptops become unreliable, so larger files are routed to the desktop app, which streams from disk and has no limit.

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