Online Video Compressor
Compress MP4 and WebM videos with selectable resolution and quality. 100% private, all processing in your browser
Click or drag files here
Batch upload supported
MP4, WebM, MOV, AVI
Start compressing your video
Click or drag a video to the area above, set options to start compressing
Frequently Asked Questions
There will be some quality loss. Control quality via the CRF slider: lower values mean higher quality and larger files, higher values mean higher compression. Start from the default value.
No. All compression is done locally in your browser via ffmpeg.wasm. Your video data never leaves your device, ensuring complete privacy protection.
Supports common video formats for upload (e.g. MP4, WebM, MOV), with output format selectable as MP4 (good compatibility) or WebM (smaller size).
The first use loads the ffmpeg.wasm processing engine into your browser. Once loaded, processing is local and subsequent uses are faster.
Subject to browser memory and device performance, we recommend processing smaller video files. Very large videos may fail due to insufficient memory.
Completely free. This is a pure frontend online tool - no registration required, no payment needed, just open and use.