Convert OPUS to MP3
Runs in your browser. Your files never leave your device.
How we keep your files private
How to use Convert OPUS to MP3
- Choose or drop your OPUS file.
- Wait while your browser converts it to MP3 (the first run downloads the converter once).
- Download the MP3 file.
Common uses
- Listening to audio on any device.
- Extracting the soundtrack of a video.
- Making smaller audio files.
About this tool
OPUS is a modern audio codec used for voice chat and streaming. MP3 is a lossy audio format that plays on practically every device.
Conversion runs on your device with FFmpeg compiled to WebAssembly, so your file is never uploaded. The first conversion downloads the engine (about 30 MB), which your browser then caches. Large files need a lot of memory, so use a desktop browser for videos over a few hundred megabytes.
Next steps
Frequently asked questions
Is my file uploaded?
No. The conversion runs in your browser with FFmpeg compiled to WebAssembly.
Why is the first conversion slow?
The converter engine (about 30 MB) downloads once and is cached. Conversions then run on your device, so large files take time.
Will converting OPUS to MP3 reduce quality?
Lossy formats lose a little quality each time they are re-encoded. Lossless targets such as WAV or FLAC keep what the source has.
What is the maximum file size?
There is no fixed limit, but browser memory is: files of a few hundred megabytes can work on a desktop, much less on phones.
What bitrate is used?
You can choose 96 to 320 kbps; 192 kbps is the default and sounds good for most music.
Are my files uploaded to a server?
No. Everything runs inside your browser on your own device, so your files and text are never sent anywhere.
Is it really free?
Yes. There is no sign-up, no watermark and no limit on how often you use it.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers. Very large files may be slow on older phones.