Convert Opus to MP3.
Opus is the efficient modern codec behind voice notes, Discord clips and web audio — and plenty of older players and editors still can't open it. Convert to MP3 that plays everywhere.
The codec that's everywhere and nowhere
Opus quietly powers a huge amount of the audio you hear online — voice messages, Discord calls, browser audio, YouTube streams. It earns its place by sounding good at tiny file sizes. But hand someone a bare .opus file to play in an older app or load into an editor, and it often just won't open. MP3 trades a little efficiency for the ability to play on literally anything.
Voice notes worth keeping
A lot of Opus files are voice recordings. Once it's an MP3, you can hand it to TranscriptAI for a transcript and summary.
How it works
- 01
Add your Opus
Drop one or many .opus files, or click to browse. Private by default.
- 02
Convert with a local engine
Opus becomes MP3 with ffmpeg — no paid API in the loop.
- 03
Download or transcribe
Grab your MP3, or send it to TranscriptAI for a transcript.
Plays on every device, player and editor
High-bitrate, faithful audio
Great for voice notes, Discord and web clips
Private uploads, auto-deleted after 1 hour
Batch convert many at once
Transcript-ready output
Your file is ready. Want to do more with it?
Open this file in TranscriptAI to generate a transcript, summary, structured notes, flashcards, quiz questions or action items — automatically.
Common questions
What is an Opus file?+
Opus is a modern, royalty-free audio codec that's excellent at low bitrates — which is why messaging apps, Discord, YouTube and web browsers use it. The catch is reach: lots of older players, car stereos and audio editors don't support it yet. MP3 does.
Is it free?+
Yes — convert Opus to MP3 free, with no signup. Paid plans add larger files and bigger batches.
Is my file private?+
Uploads go to a private bucket, are converted, and auto-delete after 1 hour. Files never touch a third-party converter.
What about quality?+
Both are lossy, so it's a re-encode — but at a high MP3 bitrate the difference is inaudible, especially for speech.
Related workflows