Video compressor

Shrink MP4, MOV, MKV and WebM videos with resolution and quality presets — processed locally.

Runs in your browser

MP4, MOV, MKV, WEBM, M4VMP4100% local · no upload

ResolutionDownscaling is usually the biggest size win.Quality

Guide

How to convert video compressor

Pick a video
MP4, MOV, MKV or WebM up to 500 MB — everything is processed on your device.
Choose the presets
720p + Medium is the usual sweet spot; drop to 480p + Low when size matters most.
Download the smaller MP4
The result plays anywhere — H.264 + AAC in an MP4 container.

Format details

Input formats: MP4, MOV, MKV, WEBM, M4V
Output format: MP4
Privacy: No upload · processed locally

Frequently asked questions

How much smaller will my video get?

Resolution is the biggest lever: 1080p → 720p usually cuts the file roughly in half; 480p cuts it further. Exact numbers depend on the source bitrate — screenshots of a static scene compress far better than fast motion.

Why is compression slower than converting?

Compressing means re-encoding every frame rather than copying the existing stream. A 10-minute 4K clip can take a few minutes on a laptop.

Does it upload my video?

No — the encoder runs in your browser. Large videos never leave your device, which is also why 500 MB is the practical ceiling.

Is the audio compressed too?

Yes, to AAC at 128 kbps, which is transparent for speech and most music.

Keep converting

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