Video Compressor
Compress video files online for free. Reduce MP4, WebM, MOV file sizes while maintaining quality. No upload required.
Free video compressor. Reduce MP4, WebM, MOV file sizes with quality and resolution controls. 100% browser-based compression using FFmpeg.
- ✓ Compress MP4, WebM, and MOV video files
- ✓ Adjustable quality: high, balanced, or maximum compression
- ✓ Resolution presets: 1080p, 720p, 480p, 360p
- ✓ Shows size reduction percentage after compression
- ✓ 100% client-side - videos never uploaded to servers
How to Compress a Video
- 1 Drop your video file into the upload area or click to browse
- 2 Review the original file size and video duration
- 3 Select quality level and target resolution for compression
- 4 Click 'Compress Video' to reduce the file size
- 5 Download your compressed video and check the size reduction
Frequently Asked Questions
How does browser-based video processing work? ▼
MagicKit uses FFmpeg compiled to WebAssembly (WASM). This brings professional video editing capabilities directly to your browser.
What video formats are supported? ▼
MP4, WebM, MOV, and AVI. Some tools also support MKV and other formats.
Is there a file size limit for videos? ▼
We recommend files under 500MB for optimal browser performance. Larger files will work but may be slower.
Why does video processing take time? ▼
Video encoding is computationally intensive. Processing happens on your device, so speed depends on your computer's capabilities.
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Last updated: January 15, 2026 · v2.1