OPUS to MP3 converter
Turn OPUS files into MP3 in your browser. Nothing is uploaded.
Your files never leave your device.
Quick answer
To convert OPUS to MP3, drop your OPUS files in and press Convert. The conversion runs in your browser tab, so your audio is never uploaded.
Drop files here
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How to convert OPUS to MP3
- Drop your OPUS files onto the box, or press Choose files.
- Pick a quality. 192 kbit/s is a good everyday choice; 320 is the best you can get for music.
- Press Convert. A progress bar shows how far along it is.
- Download your MP3 file, or all of them as a ZIP.
OPUS is a modern open audio format that sounds good even at low bitrates. Voice notes in many chat apps use it. MP3 is the most widely supported audio format. It plays on every phone, car stereo and music app, and its lossy compression keeps files small.
Common questions
Why convert OPUS to MP3?
OPUS is a modern open audio format that sounds good even at low bitrates. Voice notes in many chat apps use it. Convert to MP3 when you need a file that works on the device or app you are using, or when you want a smaller file. MP3 is the most widely supported audio format. It plays on every phone, car stereo and music app, and its lossy compression keeps files small.
Will the sound quality drop?
Going from one lossy format to another loses a little more each time. Use the highest bitrate you are comfortable with, and keep the original file.
Is my audio uploaded anywhere?
No. The conversion happens inside your browser tab, so your audio never leaves your device. We cannot see it or keep a copy.
Can I convert many files at once?
Yes. Drop several files in and they are converted one after another. When they finish you can download each one, or all of them together as one ZIP.
Why was the first conversion slow to start?
The first time you convert audio or video, your browser downloads the conversion engine (ffmpeg, about 30 MB) from a public CDN. After that it is cached, so the next ones start straight away. Your files are not part of that download.
How big a file can I convert?
Everything runs in your browser's memory, so the limit is your device. We suggest about 500 MB on a computer and 100 MB on a phone. Beyond that, the tab may slow down or run out of memory. A computer is much faster than a phone.