Free tools › Audio and video

Compress audio

Speech at 96 kbps is a third of the file and sounds the same. Music, a little more.

This one runs on your credits. Speech at 96 kbps is a third of the file and sounds the same. Music, a little more.

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

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

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

How to compress audio

Drop the audio.
Pick 96 for speech, 128 for music.
Press Compress and download the MP3.

What happens to your file

The audio is decoded and encoded again as MP3 at the bitrate you pick — a constant bitrate, so the size is the length times the rate: an hour of speech at 96 kbps is about 43 MB, at 128 about 58 MB. Channels and sample rate are kept; a mono recording stays mono and gets the whole budget.

Recompressing an MP3 loses a little each time. Going from 320 to 96 is fine for speech; for music that matters to you, compress once from the WAV or FLAC.

Questions

How small will it get?

A 320 kbps MP3 becomes about a third of its size at 96 kbps. A WAV shrinks by roughly fifteen times. The result page shows both numbers.

Do it once, not on every form

Fixing a file here means downloading it and going back to the form. The Fylane extension does this work inside the form instead, on the file you already have.

And it keeps the result. The next application that asks for a résumé, a cover letter and a photo fills all three from one tap, each one refitted to what that site accepts.

Your files stay in the browser, encrypted, on your machine. Nothing is uploaded to keep them and nothing is sent anywhere to fill a form.

Filmed from the extension: three upload fields on a job application, filled from one tap.

Add to Chrome — free What it does

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": "mp3",
      "bitrate": 96
    }
  }'

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.