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Convert Audio
Convert audio files between common formats including MP3, WAV, OGG, FLAC, and M4A, with configurable output bitrate and sample rate.
API Endpoint
POST /api/v1/tools/audio/convert-audio
Accepts multipart form data with an audio file and a JSON settings field.
Parameters
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
| format | string | No | "mp3" | Output format: mp3, wav, ogg, flac, m4a |
| bitrateKbps | integer | No | 192 | Output bitrate in kbps (32 to 320) |
| sampleRate | integer | No | source rate | Output sample rate in Hz: 8000, 16000, 22050, 32000, 44100, 48000, or 96000. Omit to keep the source rate |
Example Request
bash
curl -X POST http://localhost:1349/api/v1/tools/audio/convert-audio \
-H "Authorization: Bearer si_your-api-key" \
-F "[email protected]" \
-F 'settings={"format": "mp3", "bitrateKbps": 192, "sampleRate": 44100}'Example Response
json
{
"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
"downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/audio.mp3",
"originalSize": 4500000,
"processedSize": 2800000
}Notes
- Supported input formats include MP3, WAV, OGG, FLAC, AAC, M4A, WMA, AIFF, and OPUS.
- Bitrate only applies to lossy formats (MP3, OGG, M4A). Lossless formats like WAV and FLAC ignore this setting.
- MP3 output supports sample rates up to 48000 Hz. The 96000 Hz option applies to WAV, OGG, FLAC, and M4A only.
- MP3 bitrate is capped by the sample rate: at most 64 kbps at 8000 Hz and 160 kbps at 16000 or 22050 Hz. Requests above the cap are rejected instead of being silently lowered.
- The output filename keeps the original name with the new extension.