Tsubasa is a fast video compression service that runs locally on your device. Maintain the best quality while staying under MB file limits.

Tsubasa was created as a proof-of-concept for a ffmpeg-wasm implementation.

• ✅ Allows transcoding to a size limit (for services with a file size upload limit)
• ✅ Allows scaling resolution, to preserve video quality/bitrate
• ✅ Preserves audio quality
• ✅ Runs locally on your device

With the return of secure WASM support in browsers, we wanted to see: Could we actually build a server-less compression service, running a desktop program, purely in JavaScript and WebAssembly?

Tsubasa is a work in progress, and welcomes feature suggestions, bug reports, and pull requests.

See the Wiki for development setup >

Tsubasa was named after 翼, the Japanese kanji for "wing".