A GitHub project now offers a fully functional FFmpeg interface that runs completely in the browser.
The tool compiles FFmpeg to WebAssembly and executes it inside a Web Worker. All video and audio processing stays on the user’s device, and the app can be installed as a progressive web app that works offline after the first load.
This matters because it removes the need to trust third‑party services with media files, a common privacy concern. It also sidesteps bandwidth costs for bulk transcoding and makes FFmpeg accessible on devices that lack native binaries.
Expect similar client‑side ports of heavyweight tools, but remember that WebAssembly still carries performance limits compared to native builds.