About MP3 Converter

Simple, private audio tools that anyone can use.

Why we built this

Most online converters ask you to upload your files to a server, wait in a queue, and then download the result. That is slow, and it means handing your private recordings to a stranger. We wanted something better: a converter that is fast, free and keeps your files on your own device.

So we built MP3 Converter as a tool that runs entirely in your web browser. There is no upload, no account and no limit on how many files you convert.

How the tool works

Decoding. Your browser’s Web Audio engine reads common formats. For others, such as MKV, AVI or WMA, we load FFmpeg, a widely used open-source media library, compiled to WebAssembly.
Encoding. The MP3 is created with LAME, the open-source encoder trusted for over two decades, running in a background worker.
Saving. The finished MP3 goes straight from your browser’s memory to your downloads folder.

Our principles

Your files stay on your device.
Plain, honest explanations without technical jargon.
Free tools without watermarks or sign-up walls.
Respect for creators: please only convert content you own or may use.

Questions or ideas? Get in touch.