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.
Inside The Conversion
See The Input. Inspect The Result.
A real OPUS to MP3 conversion using a sample file. Compare the files below, then use the converter above with your own file.
Recorded Sample
Converted on the server in this run.
gymnopedie-no-1.opus
Waveform Preview, 20 s of audio
gymnopedie-no-1.mp3
Waveform Preview, 20 s of audio
Previews show the sample files from this recorded conversion. Choose Input or Result to focus on one file.
View The Original Run Capture
A screenshot of the completed run, preserved in its original theme. The comparison above adapts to your current theme.
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
OPUS to MP3: re-encoded
MP3 is a compressed, lossy audio format, so this re-encodes the sound and the file gets smaller. Every lossy re-encode sheds a little quality, so convert from the best source you have rather than chaining conversions.
Need more than a conversion?
Send your audio or video to 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. No signup and no watermark. Free covers 10 server conversions a day, up to 100 MB a file. Pro removes the daily limit and raises the file limit to 2 GB.
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.