Vorbis is a mature, well-supported codec, so most listeners won't notice a difference at typical settings. That said, any conversion between lossy formats works with whatever quality is already in the source file — it can't restore detail that MP3 compression already removed.

No. The entire conversion happens inside your browser using WebAssembly. Your audio file never touches our server or anyone else's — it stays on your device from start to finish.

The first time you convert a file, your browser downloads a small audio-processing engine so it can encode OGG/Vorbis locally. It's a one-time load per visit — after that, conversions start right away.

Double-check the file is a genuine MP3 and under the size limit shown above. If it still doesn't work, try another browser, disable any ad blockers or privacy extensions that might block WebAssembly, and give it another go.

Yes — completely free, with no signup and no limit on how many files you convert.

Absolutely. Once it's downloaded, the OGG file is a normal local file — play it in any compatible app or device, with or without an internet connection.