Compress Videos Instantly
Reduce your video file size in minutes. No upload required — everything happens in your browser. Free, private, and works on any device.
Powered by ffmpeg.wasm - runs entirely in your browser
Want to cut out unnecessary parts first? Trim your video before compressing.
Need to record your screen? Record your screen.
100% Private
Your video never leaves your device. All compression happens locally using ffmpeg.wasm. No uploads, ever.
Quality Control
Choose from 5% to 100% quality. Balance file size against visual quality exactly to your needs.
Resolution Options
Keep original resolution or downscale to 1080p, 720p, 480p, or 360p for maximum size reduction.
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Frequently Asked Questions
How does this work without uploading my video? ▼
This tool runs directly in your browser using ffmpeg.wasm — a WebAssembly port of the popular FFmpeg library. Your video is processed locally on your device using H.264 re-encoding. Nothing is ever sent to a server.
What video formats are supported? ▼
You can upload MP4, MOV, MKV, WebM, and AVI files. The compressed output is always MP4 (H.264 + AAC) for maximum compatibility across all devices and platforms.
How long does compression take? ▼
Because re-encoding happens in your browser, it depends on your device speed and video length. A 100MB video typically takes 2–5 minutes on a desktop computer. Selecting a lower resolution or quality setting significantly speeds up processing.
What quality setting should I use? ▼
For most uses, 65% (the default) gives an excellent balance of file size and quality. For archiving with minimal quality loss: 80–90%. For sharing on social media or messaging apps: 50–65%. For maximum compression: go lower, but expect visible quality reduction.
Is there a file size limit? ▼
The browser tool handles files up to about 4GB. For larger files, the free desktop app handles any size with no limits — and it's significantly faster since it uses native ffmpeg instead of browser-based WASM.