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Video Compress
Compress videos with adjustable quality and resolution. Runs 100% in your browser using FFmpeg WebAssembly.
About Video Compress
Compress videos directly in your browser with no uploads or server processing. RAW's Video Compressor uses FFmpeg WebAssembly to re-encode videos at lower bitrates and resolutions. Choose from quality presets and resolution options to find the right balance between file size and visual quality.
How to use
- 1Upload a video by dragging and dropping or clicking to browse.
- 2Choose a quality preset (High, Medium, or Low) and resolution.
- 3Click Compress and wait for processing to complete.
- 4Compare the original and compressed file sizes, then download.
Frequently Asked Questions
How does browser-based video compression work?
The tool uses FFmpeg compiled to WebAssembly (WASM), which runs the same compression algorithms as desktop FFmpeg entirely in your browser. The WASM engine is downloaded once (~31MB) on first use and cached for subsequent compressions.
Is my video uploaded anywhere?
No. All processing happens locally in your browser. Your video never leaves your device — nothing is uploaded to any server.
What output format is used?
Videos are compressed to MP4 (H.264 video + AAC audio), which is universally supported across all devices, browsers, and media players.
Why is compression slower than desktop software?
WebAssembly runs in a sandboxed browser environment without hardware acceleration, so it is slower than native FFmpeg. Compression time depends on video length, resolution, and your device's CPU.