Audio & Media
Video Compressor — Reduce MP4 & MOV Size Online
Compress videos in your browser with FFmpeg. Choose presets for web sharing, adjust quality and resolution, and download a smaller MP4 or WebM — 100% client-side, no uploads.
Private by design. Videos are processed with FFmpeg inside your browser. Files never leave your device — safe for personal, work, or confidential footage.
Works on mobile. Touch-friendly controls, mobile file limits, and faster encoding presets on phones and tablets. Keep the tab open while compressing.
Common use cases
📱
WhatsApp & Social
Shrink clips before sharing on messaging apps with size limits.
✉️
Email Attachments
Reduce MP4 size to fit common email attachment limits.
🌐
Website & CMS Uploads
Compress hero videos and demos for faster page loads.
🔒
Private Footage
Process sensitive recordings locally — nothing uploaded.
How it works
- 1
Upload
Drop or select MP4, MOV, WebM, or MKV (up to 150 MB on mobile, 500 MB on desktop).
- 2
Choose preset
Pick Web & Social, Balanced, Smallest File, or custom CRF and resolution.
- 3
Download
FFmpeg re-encodes locally. Download your compressed MP4 or WebM when done.
Frequently asked questions
Why browser-based compression?
Cloud compressors upload your entire video to a remote server. This tool uses FFmpeg WebAssembly — the same engine as many desktop apps — running entirely on your device. It is slower than native software but keeps your footage private and works without an account.
Tip: For fastest results on mobile, use Smallest File or Web & Social presets and shorter clips under one minute when possible.
More Free Audio & Video Tools
Every tool in our media suite runs in your browser — no uploads, no sign-up. Compress video, convert audio, trim clips, join tracks, change speed, or boost volume.
Audio Cutter & Ringtone Maker
Cut MP3, WAV, M4A and OGG files online. Trim audio, create custom ringtones, preview changes, and download instantly without uploading your files.
Audio Converter
Convert MP3, WAV, M4A, OGG, AAC, FLAC and other audio formats directly in your browser. Fast, secure and completely free.
Audio Joiner & Merger
Join and merge multiple audio files into one. Supports MP3, WAV, OGG, M4A, FLAC. Drag to reorder tracks, add silence gaps, crossfade between clips, and fade in/out per track.
Audio Speed Changer
Change audio playback speed from 0.25x to 4x with or without pitch preservation. Independent pitch shifting in semitones. Supports MP3, WAV, OGG, M4A, FLAC