MP4 Compressor
Compress MP4 videos using H.264 encoding directly in your browser. Fast, private, and free. Your files never leave your device.
Drag & Drop Videos
MP4 · MOV · WebM · MKV · AVI · FLV & more · Up to 400 MB
Live Engine Monitoring
v2.4.0-Stable1.2 TB
Bandwidth Saved Today
0.4s
Avg Process Time
99.9%
Compression Fidelity
Military-Grade Privacy
Auto-purge after 60m. Zero logs. Fully encrypted processing.
Perfect Transparency
Advanced alpha-channel preservation for UI designers.
No Registration
Jump straight into processing without the sign-up friction.
Knowledge Base
Frequently Asked Questions
How much can I compress an MP4 video?↓
Typically 50-80% size reduction depending on source quality and settings. Use Max Compression for smallest file size or High Quality for best visual results.
Does compressing MP4 reduce video quality?↓
Yes, compression reduces quality. Our tool uses CRF encoding which preserves quality in motion-rich scenes better than fixed bitrate compression.
How long does MP4 compression take?↓
Processing happens in your browser using WebAssembly. A 100MB video typically takes 2-5 minutes. Speed depends on your device and settings chosen.
Is MP4 compression private?↓
Yes. Files are processed entirely in your browser using FFmpeg.wasm. Nothing is uploaded to any server. Your videos remain completely private.