Video Compressor

Free

Compress MP4 and WebM videos by adjusting quality, resolution, and frame rate. All processing happens in your browser.

Tool workspace

Upload a video to compress

Video Compression

Constant Rate Factor

CRF is x264's quality mode. Unlike bitrate targeting, CRF lets the encoder use more bits for complex scenes and fewer for simple ones. CRF 18 is visually transparent. CRF 28 shrinks files by ~70% with barely noticeable loss.

Preset Trade-off

The preset controls how hard the encoder works to find redundancies. Slower presets squeeze ~10-20% more efficiency but take proportionally longer. For browser use, fast or medium is the practical sweet spot.

Resolution Scaling

Halving resolution (50%) quarters the pixel count — often the single biggest file-size win. A 1080p video scaled to 720p at CRF 28 is typically 5-10× smaller than the original with good perceptual quality.
Pro Tip: For sharing on mobile or social media, try 720p at CRF 28 with the fast preset. It usually produces files under 10 MB per minute.
All processing happens in your browser. Your files are never uploaded to any server.
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