Convert FLAC to MP3 via API

Convert lossless FLAC files to compact MP3 for portable devices, streaming, and web distribution. Reduce file sizes dramatically while maintaining excellent perceived audio quality.

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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 0 {out_audio}",
  "input_files": {
    "in_audio": "https://example.com/input.flac"
  },
  "output_files": {
    "out_audio": "output.mp3"
  }
}'

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

Common Variations

320kbps constant bitrate

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

V0 variable bitrate (best quality)

-i input.flac -c:a libmp3lame -q:a 0 output.mp3

192kbps for balanced size/quality

-i input.flac -c:a libmp3lame -b:a 192k output.mp3

Related Operations

Convert MP3 to WAV via API | RenderIO Convert OGG to MP3 via API | RenderIO Convert WAV to MP3 via API | RenderIO Convert M4A 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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