mediabunny

Why we included this project

Most media work in the browser ends up delegated to a server or hidden behind a native binary, but Mediabunny handles demuxing, muxing, and transcoding directly on the client. It is a from-scratch TypeScript library with zero dependencies that speaks common containers like MP4, WebM, MP3, and HLS, and its tree-shaking means you only ship the code you actually use. Encoding and decoding are hardware-accelerated through the WebCodecs API, so client-side cropping, rotating, resizing, and format conversion are fast enough to power real editing and export tools without a round-trip to a backend. The same code runs in Node, Bun, or Deno when you need server-side work, and several commercial video products sponsor the project, a decent sign it sees real-world use. Teams building browser-based editors, clip tools, or media-heavy web apps get a solid alternative to FFmpeg that stays entirely in the user's browser.