Convert AAC to MP3 via API

Convert AAC audio files (including M4A) to universally compatible MP3 format. Ideal for sharing audio across all devices and platforms.

Try it in your browser

Loading FFmpeg engine... (~31 MB)

Use the API

curl -X POST https://renderio.dev/v1/commands \
  -H "X-API-KEY: ffsk_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
  "ffmpeg_command": "-i {in_audio} -c:a libmp3lame -q:a 2 {out_audio}",
  "input_files": {
    "in_audio": "https://example.com/input.aac"
  },
  "output_files": {
    "out_audio": "output.mp3"
  }
}'

Need an API key? Get your free API key to start processing files programmatically.

Common Variations

From M4A container

-i input.m4a -c:a libmp3lame -q:a 2 output.mp3

320kbps high quality

-i input.aac -c:a libmp3lame -b:a 320k output.mp3

128kbps for smaller size

-i input.aac -c:a libmp3lame -b:a 128k output.mp3

Related Operations

Convert Video to AAC Audio via API | RenderIO Convert MP3 to WAV via API | RenderIO Convert M4A to MP3 via API | RenderIO Convert OGG to MP3 via API | RenderIO

Need to process at scale?

Automate this with the RenderIO FFmpeg API. Process thousands of files programmatically or through no-code video automation.

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