Tool workspace

MP4, MOV, WebM, or MKV · 75 MB max. H.264 MP4 output stays on your device. Nothing is uploaded to our servers.

Drop a video here or click to browse

Compression quality

Lower numbers keep more detail. Higher numbers make a smaller file.

Compressed MP4 ready

0%

How it works

  1. Upload MP4, MOV, WebM, or MKV (up to 75 MB).
  2. Adjust the quality slider (CRF) to balance size and sharpness.
  3. Compress locally, compare file sizes, and download H.264 MP4.

Features

  • Browser-side FFmpeg.wasm, no server upload
  • CRF quality slider for fine control
  • Before and after file size on the result card
  • H.264 MP4 output for broad compatibility

Compress MP4 before you upload

Large screen recordings and phone videos exceed attachment limits quickly. Compressing first keeps detail where it matters while cutting bitrate for sharing.

Video Compressor FAQ

Savings depend on the source. Screen recordings often shrink dramatically; already-compressed clips may save less.

Higher presets keep more detail. Aggressive presets trade quality for a smaller file.

No. Compression runs in your browser. We do not receive your video file.

75 MB per upload so encoding stays responsive on typical laptops and phones.

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