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Opus to MP3

Opus is what a voice note from a messaging app is, and what a lot of calls are recorded as

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What the conversion sites charge

Convertio$6.99 / monthconverts on their servers, with a daily cap
Zamzar$12 / monthconverts on their servers, with a size cap
CloudConvert$10 / monthconverts on their servers, priced per minute
PixPunkFreeno upload, no account, no daily cap

Opus is tuned for speech at low bitrates, so a voice note is already small. Converting to MP3 will usually make it larger, not smaller, which surprises people. Their caps exist because every conversion runs on a machine they rent. Yours runs on the machine in front of you.

  1. 1

    Where your Opus came from

    Opus is what a voice note from a messaging app is, and what a lot of calls are recorded as. It is the best low bitrate codec there is and almost nothing outside a browser or a chat client will play it.

  2. 2

    Why you are converting it

    Music players, car stereos, editing software, and any form that expects an audio file it recognises. MP3 is the format nothing refuses. That is its entire remaining argument and it is a good one.

  3. 3

    What it costs

    MP3 is lossy, so a little goes at any bitrate. 192 kbps is transparent for speech and close to it for music; 320 is the ceiling and is only worth it when the source was better than the target.

FAQ

How do I convert Opus to MP3?
Drop the file on this page and press the button. It runs in your browser, so there is no upload, no account and no daily limit.
Why will my device not open a Opus file?
Music players, car stereos, editing software, and any form that expects an audio file it recognises.
Is there anything odd about Opus?
Opus is tuned for speech at low bitrates, so a voice note is already small. Converting to MP3 will usually make it larger, not smaller, which surprises people.
Does converting to MP3 lose quality?
MP3 is lossy, so a little goes at any bitrate. 192 kbps is transparent for speech and close to it for music; 320 is the ceiling and is only worth it when the source was better than the target.
Is the file uploaded?
No. The decode and the encode both happen in the page, and no request carries the audio anywhere. Watch the network panel while it runs.

The other tools

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