ConvertOnline

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1. Convert Online
2. Audio Converters
3. AAC to MP3

{
  "convert": "aac-mp3",
  "multiple": true,
  "from": "aac",
  "to": "mp3",
  "note": "This conversion re-encodes an already compressed AAC file into MP3 format. While useful for device compatibility, it may slightly reduce audio quality due to double lossy compression.",
  "controls": [
    {
      "type": "dropdown",
      "name": "bitrate",
      "label": "Audio Bitrate",
      "options": [
        {
          "label": "64 kbps",
          "value": "64k"
        },
        {
          "label": "96 kbps",
          "value": "96k"
        },
        {
          "label": "128 kbps (Standard)",
          "value": "128k"
        },
        {
          "label": "192 kbps",
          "value": "192k"
        },
        {
          "label": "256 kbps",
          "value": "256k"
        },
        {
          "label": "320 kbps (High)",
          "value": "320k"
        }
      ],
      "defaultValue": "128k",
      "desc": "Sets the output MP3 bitrate. Higher bitrates yield better sound but larger file sizes. 128 kbps is a balanced default."
    },
    {
      "type": "dropdown",
      "name": "channels",
      "label": "Audio Channels",
      "options": [
        {
          "label": "Mono (1 channel)",
          "value": 1
        },
        {
          "label": "Stereo (2 channels)",
          "value": 2
        }
      ],
      "defaultValue": 2,
      "desc": "Choose mono for a smaller file or stereo for better sound separation. Stereo is recommended for music."
    },
    {
      "type": "dropdown",
      "name": "sample_rate",
      "label": "Sample Rate (Hz)",
      "options": [
        {
          "label": "22050 Hz",
          "value": 22050
        },
        {
          "label": "44100 Hz (CD Quality)",
          "value": 44100
        },
        {
          "label": "48000 Hz",
          "value": 48000
        }
      ],
      "defaultValue": 44100,
      "desc": "Sets the audio sampling frequency. 44100 Hz is standard and compatible with most playback devices."
    }
  ],
  "type": "audio"
}