Frequently Asked Questions
Get answers to common questions about our video compression tool and learn how to get the best results.
1Is my video uploaded to a server?
No. Compression runs in your browser using WebAssembly (ffmpeg.wasm). Your videos never leave your device.
2Which formats are supported?
Input: MP4, MOV, WebM, AVI. Output: MP4 (H.264 + AAC) for maximum compatibility.
3Can I target a specific size like 16MB or 25MB?
Yes. Our presets automatically calculate the best settings to hit your target size.
4Will quality drop significantly?
We optimize for the best quality at your target size. You can also use custom settings for more control.
5Does it work on iPhone/Android?
Yes, modern mobile browsers are supported. For files over 200MB, desktop is recommended for stability.
6How fast is the compression?
Processing happens locally using WebAssembly. Speed depends on your device and video size - typically 2-5x real-time.
Ready to compress your videos?
Start compressing your videos now with our free, browser-based tool.
Start Compressing