OGG to MP3 Converter
Convert OGG Vorbis and Opus audio to MP3.
File
Result
Your converted file will appear here.
About the OGG to MP3 converter
OGG and Opus are excellent, genuinely open codecs, and they are what WhatsApp voice notes, Discord recordings and a great deal of game audio use. They are also the formats most likely to be refused by a video editor or an older phone.
This converter decodes either and produces a standard MP3.
Voice notes
Messaging apps encode voice notes as Opus at a very low bitrate, because it stays intelligible where MP3 would not. Converting one to MP3 cannot recover fidelity that was never captured.
Encode at 96 kbps mono. Choosing 320 kbps for a voice note produces a much larger file that sounds identical — the source is the limit, not the encoder.
Choosing a bitrate
192 kbps is the sensible default for music — most listeners cannot reliably tell it from the source on ordinary equipment. 320 kbps is the ceiling MP3 allows and worth it if the file is going to be archived or edited further.
For speech — interviews, lectures, podcasts, voice notes — 96 kbps mono is plenty and produces a file several times smaller. Music at that rate starts to sound obviously thin, particularly in cymbals and reverb tails.
How the conversion works
Your browser decodes the file with the Web Audio API — the same decoder it uses to play media — which hands back raw PCM samples. Those samples are then re-encoded into the output format.
MP3 encoding uses LAME compiled to JavaScript, running in a background worker so a long file does not freeze the page. Nothing is uploaded: no server sees the audio, there is no queue, and there is no processing limit beyond your own device.
Frequently asked questions
What is the difference between OGG and Opus?
Ogg is a container; Vorbis and Opus are codecs that live inside it. Opus is the newer and better of the two. Both decode here, so the distinction rarely matters in practice.
Will converting reduce the quality?
Re-encoding lossy audio always loses a little, because the encoder is working from what survived the first compression rather than from the original. Keep the bitrate at or above the source and it will not be audible. Converting from a lossless source such as WAV or FLAC has no such problem.
Is my file uploaded?
No. Decoding and encoding both happen in your browser. The audio never leaves your device, which is why there is no size limit imposed by a server.