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Free tools › Audio and video

MP3 to Opus

Half the bytes of an MP3 at the same sound; what WhatsApp and Discord speak.

This one runs on your credits. Half the bytes of an MP3 at the same sound; what WhatsApp and Discord speak.

Sign in and get 500 free credits every month — enough for many files — then drop the file in the workbench and run mp3 to opus there.

Pick a file below to see exactly what it would cost.

Sign in and run it — free credits included

More free conversions, where you upload. The Fylane extension does the same work inside any upload form, on its own free share every day.About the extension

How to convert MP3 to Opus

  1. Drop the audio.
  2. Nothing to choose.
  3. Press Convert and download the Opus file.

What happens to your file

The audio is decoded and encoded with libopus at 96 kbps in an Ogg container (the .opus file every browser, Android and VLC play). Opus resamples to 48 kHz internally, as the codec requires; a 44.1 kHz source comes out at 48 kHz.

Questions

Which players open .opus?

Chrome, Firefox, Edge, Safari 17+, Android, VLC, foobar2000 and most podcast apps. Older iPhones and car stereos may not; for those, keep MP3.

Do this in code

curl -X POST https://api.fylane.dev/v1/jobs \
  -H "Authorization: Bearer $FYLANE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "file_id": "<file id>",
    "operation": "audio.convert",
    "options": {
      "format": "opus"
    }
  }'

The same operation, audio.convert — mp3, wav, aac, flac, ogg, opus or aiff out of whatever came in. Upload first with the quickstart; every option is on the operations page. 500 free credits a month, then $5 per thousand.