Audio loudness normalizer

Open Audio loudness normalizer on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "audio-loudness-normalizer",
  "category": "media-tools",
  "built": true,
  "requirements": "One recording up to 256 MiB and 5 minutes; target -40 to -5 LUFS, ceiling -9 to 0 dB. WAV is read with every sample intact; other formats are decoded by your browser at 48 kHz. Everything is processed on your device and nothing is uploaded. Download: WAV in the source format or the format you choose and a JSON report with loudness and peaks before and after.",
  "implementation": {
    "fields": [
      {
        "key": "target",
        "label": "Target loudness (LUFS)",
        "value": "-16",
        "type": "number",
        "min": -40,
        "max": -5,
        "step": 0.5
      },
      {
        "key": "ceiling",
        "label": "Peak ceiling (dB)",
        "value": "-1",
        "type": "number",
        "min": -9,
        "max": 0,
        "step": 0.1
      },
      {
        "key": "mode",
        "label": "Peak mode",
        "value": "true",
        "type": "select",
        "values": [
          "true",
          "sample"
        ],
        "labels": {
          "true": "Estimated true peak",
          "sample": "Sample peak"
        }
      },
      {
        "key": "encoding",
        "label": "WAV sample format",
        "value": "match",
        "type": "select",
        "values": [
          "match",
          "pcm16",
          "pcm24",
          "float32"
        ],
        "labels": {
          "match": "Same as source",
          "pcm16": "16-bit PCM",
          "pcm24": "24-bit PCM",
          "float32": "32-bit float"
        }
      }
    ],
    "registrationFamily": "audio-dsp-dynamics-filters",
    "presentation": "metrics",
    "files": true,
    "accept": ".wav,.mp3,.m4a,.aac,.flac,.ogg,.oga,.opus,.webm,audio/*",
    "maxFileBytes": 268435456,
    "input": false,
    "inputErrorCode": "AUDIO_DSP_DYNAMICS_FILTERS_TOO_LONG",
    "note": "Runs locally in your browser. Normalizes one recording up to 5 minutes and 256 MiB.",
    "experience": {
      "automatic": false,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Audio file",
      "placeholder": "Choose a recording",
      "help": "Set a loudness target, then check the measured result. Peak limiting can prevent reaching the target. Up to 1,000,000 characters. Review the settings before running.",
      "helpParts": [
        "Set a loudness target, then check the measured result. Peak limiting can prevent reaching the target.",
        "Up to 1,000,000 characters.",
        "Review the settings before running."
      ],
      "action": null
    },
    "mode": "explicit",
    "interactive": false
  },
  "execution": "Browser interface",
  "api": null,
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}

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