OPUS to MP3

Convert OPUS audio (such as WhatsApp voice messages) to MP3 that works on any device.

or drag and drop here · Ctrl+V to paste

Processed on your device. Your files aren't uploaded to any server.

How to use: OPUS to MP3

Select one or more OPUS files.
Choose a quality, if you like.
Click Convert to MP3 to download.

About this tool

What is OPUS? Opus is a modern, open audio codec that's excellent for voice at low bit rates—it's used for WhatsApp voice messages. It's ideal for calls, voice messages, and streaming. Compatibility: plays in browsers, but not on many devices or music players.

Why convert to MP3? MP3 is one of the most widely compatible audio formats, and its compression can reduce a music file to about 1/10 of its original size. It's a great choice for music, podcasts, and audio you want to play anywhere—on phones, cars, speakers, and software.

Frequently asked questions

What's the difference between OPUS and MP3?

Both use lossy compression. Compatibility: OPUS plays in browsers, but not on many devices or music players; MP3 plays on phones, in cars, on speakers, and in software.

Does it work in all browsers?

It works in current versions of Chrome, Edge, Firefox, and Safari that support WebCodecs. Processing uses your device’s video acceleration, so it’s usually faster than uploading the file to a website.

Is there a file size or video length limit?

We don’t set a limit. Very large files (several GB) depend on your device’s memory; on phones, we recommend videos that are a few minutes long or less.

Are my files uploaded to a server?

No. This tool runs entirely in your browser: your file is read and processed on your device, and not a single byte is sent over the internet. You can even disconnect from the internet after the page loads.

Is it really free? Is there a daily limit?

It's free with no daily limits. Processing happens on your device, so there's no per-use cost and no need to limit you.

Does it work on phones?

Yes. The site works in any modern browser on Android, iPhone, Windows, Mac, and Linux—no installation needed.

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