Video Compressor
Compress and optimize videos directly in your browser. Since processing uses your device's CPU/RAM, keep files under 500MB for best results.
Click or drag a video file here
Max recommended size: 500MBVideo Compression Standards
FFmpeg WebAssembly
FFmpeg is the open-source engine powering almost every video platform on earth (including YouTube and Netflix). Using WebAssembly (WASM), we compile this C-library to run securely inside your browser's local sandbox.
CRF (Constant Rate Factor)
This tool uses x264 CRF encoding. Instead of forcing a strict bitrate, CRF dynamically allocates bits where they are needed most (complex motion) and saves bits on static frames. A CRF of 28 offers the best balance of file size reduction and visual quality.
Memory Limitations
Because WebAssembly operates within a strictly allocated memory buffer (typically capped around 2GB by the browser), compressing massive files (e.g., 2GB 4K videos) will crash the tab. Keep inputs under 500MB for stable client-side processing.