compress

Files are processed by FFmpeg & Whisper compiled to WebAssembly, in this tab — nothing is uploaded, ever. Verify: DevTools → Network.

drop a file, or click to choose

audio or video · stays on your device

quality downscale to 720p

Expect roughly 40–70% smaller at “balanced”, depending on the source.

Re-encodes with H.264 (libx264) at the chosen constant-rate-factor. Higher CRF = smaller file, lower quality. All in-browser via FFmpeg.wasm.