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FFmpeg.wasm

Compress videos online in the browser

Reduce MP4, MOV, WebM, AVI and MKV videos with simple presets. The result is exported as an optimized MP4.

Quick answer

Online video compression reduces bitrate, resolution or encoding complexity to create a smaller file. KitDevs runs this process locally with FFmpeg.wasm.

Best practices

  • Use light compression when clarity matters.
  • Use balanced compression for social posts, lessons and common attachments.
  • Use strong compression when the final file size matters most.
  • Try smaller files first on phones or low-memory devices.

Important limitation

Large video files depend on browser memory, CPU and cross-origin isolation support.

Related entities

  • video compressor
  • MP4
  • MOV
  • WebM
  • AVI
  • MKV
  • FFmpeg.wasm
Compress a video now

Use the production KitDevs tool with the same layout and colors.

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