Audio

MP3 File Generator

MP3 audio — 192 kbps, tone or sweep

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20 files / day on the free tier

cURL equivalent

curl -X POST https://gettestfiles-api.fly.dev/generate/mp3 \
  -H "Content-Type: application/json" \
  -d '{
    "duration_sec": 30,
    "sample_rate": "44100",
    "channels": "stereo",
    "tone": "440hz"
  }' \
  --output sample.mp3

About this generator

  • Files are generated on demand and streamed directly — nothing is stored.
  • Rate limited to 20 files per day per IP on the free tier.
  • For bulk generation, use the API directly from your CI pipeline.

Just need a standard file?

Download a pre-built MP3 file instantly.

⬇ Browse MP3 downloads