Compress video online free — reduce MP4, WebM and MOV size by adjusting resolution and bitrate. FFmpeg browser-based, fully private.
Video Compressor reduces video file size by adjusting resolution and bitrate. Powered by FFmpeg WASM, all processing runs in your browser — no files are uploaded to any server. Real-time size reduction display. Free, no installation required.
compress
Drag & drop a video or click to select
lock Your files never leave your device
How to use Video Compressor?
Upload the video you want to compress.
Adjust the quality (CRF) slider. Lower values mean higher quality.
Click compress and download.
Frequently asked questions about Video Compressor
What does the CRF value mean?
CRF (Constant Rate Factor) determines quality. 18 is nearly lossless, 28 is moderate compression, and 40 is high compression.
How to get the most out of Video Compressor?
CRF values of 23-28 provide the optimal balance between file size and quality.
Lowering resolution (e.g., 1080p to 720p) can further reduce file size significantly.
Long videos take more time to process; trim to the needed portion first, then compress.