Free Online Video Compressor
Reduce your video file size without losing quality. Works entirely in your browser — no uploads, no accounts.
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Drop your video here or click to upload
MP4, MOV, AVI, WebM, MKV — up to 2GB
🔒 Your video is processed locally — it never leaves your device.
Frequently Asked Questions
Does my video get uploaded to a server?
No. All compression happens in your browser using FFmpeg.wasm (WebAssembly). Your video never leaves your device.
What is the maximum file size?
There is no server-imposed limit. The practical limit depends on your device's available RAM — typically 1–2GB.
Will the video quality be affected?
You control the quality level. 'Light' mode keeps high quality with ~30–40% size reduction. 'Heavy' mode gives maximum compression with some quality loss.
What formats are supported?
Input: MP4, MOV, AVI, WebM, MKV, FLV, and most other common video formats. Output is always MP4 (H.264), which is universally compatible.
How do I compress a video for WhatsApp?
Upload your video, select 'Medium' or 'Heavy' compression, click Compress, then download. WhatsApp has a 16MB limit — use Heavy mode for long videos.
Is this free to use?
Yes, completely free. No account needed, no watermarks, no limits.
How does the compression work?
We use H.264 encoding with a configurable CRF (Constant Rate Factor) value. Lower CRF = better quality, higher CRF = smaller file. All via FFmpeg running in WebAssembly.
Can I compress video on iPhone or Android?
Yes. This tool works in any modern mobile browser including Safari on iOS and Chrome on Android.