Compress MP4 files in your browser

MP4 is the most common video format, and also one of the heaviest when exported at a high bitrate. Drop your MP4 below and CompressEasy re-encodes it locally with WebCodecs into a smaller, still-sharp MP4. No upload, no queue, no watermark.

MP4 files up to 200 MB are compressed here in your browser. Larger files open in the free desktop app.

How it works

  1. Drop your MP4 files into the box above.
  2. Choose High quality, Balanced or Maximum compression.
  3. Download the optimized MP4 — it was never uploaded.

Smaller MP4, same playback

A high-bitrate MP4 carries far more data than the eye needs. Re-encoding at an optimized bitrate keeps playback smooth while cutting file size substantially. The output is standard H.264 + AAC, so it plays on every phone, browser and TV.

Optional resolution downscale

For very large clips, the Balanced and Maximum presets cap resolution at 1080p or 720p for even smaller files when full resolution is not needed. High quality keeps the original dimensions.

Audio stays untouched when possible

If the original AAC audio is already efficient, CompressEasy copies it bit-for-bit instead of re-encoding, so there is no generation loss on the sound track.

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Frequently asked questions

Will the compressed MP4 play everywhere?

Yes. Output uses H.264 video and AAC audio in an MP4 container with fast-start metadata, which plays on virtually every device and streams well on the web.

Can I compress several MP4s at once?

Yes. Drop a batch and they are encoded one after another. Encoding is hardware-accelerated, so a one-minute 1080p clip usually takes well under a minute.

What about MP4 files over 200 MB?

They open in the free CompressEasy Desktop app for macOS and Windows, which uses FFmpeg offline and has no size limit.

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