MP3 to OPUS converter

Convert MP3 to OPUS for free, right in your browser. Your files never leave your device.

Choose MP3 files or drop them here · paste a link below

Converted on your device · never uploaded · Free limits

Where it runs: On your device
Free allowance: Unlimited
Typical time: Usually under 5 seconds
Sign-up: Not needed

What happens to your MP3

This conversion runs inside your browser, so the file is never uploaded. Files over 400 MB are sent to our server instead, and deleted within 60 minutes.

How to convert MP3 to OPUS

Choose your file Tap Choose files and pick the MP3 file, or drop it onto the page. You can add several at once.
Convert to OPUS The conversion starts on your device straight away. Nothing is uploaded.
Download Tap Download to save the result.

What is an MP3 file?

The universal compressed audio format. Every phone, car stereo and player supports it, at the cost of some quality at lower bitrates.

Every media player, phone and browser plays MP3.

More about MP3 files

What is an OPUS file?

The modern codec used by WhatsApp voice notes, Discord and Zoom. It sounds excellent at very low bitrates, which makes it great for speech.

Chrome, Firefox, VLC and Android play OPUS. Many car stereos and older players do not.

More about OPUS files

Questions

Is converting MP3 to OPUS free?

Yes, completely. This conversion runs on your device, so there is no daily limit and no sign-up. We never ask you to pay after you have converted.

Is it safe to convert my MP3 files here?

Yes. The conversion happens inside your browser, and the file never leaves your phone or computer.

How long does MP3 to OPUS take?

Usually under 5 seconds. Bigger files take longer, and you can watch the progress on each file.

Can I convert MP3 to OPUS on my iPhone or Android phone?

Yes. The converter works in Safari, Chrome and any modern browser. Tap Choose files, pick from Photos or Files, and download the result to your phone.

How do I open an OPUS file?