WAV to MP3

Open WAV to MP3 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": "wav-to-mp3",
  "category": "media-tools",
  "built": true,
  "requirements": "Bitrate/channel/sample-rate controls and preview; explain lossy output.",
  "implementation": {
    "fields": [
      {
        "key": "bitrate",
        "label": "MP3 bitrate (kbps)",
        "value": "128",
        "type": "select",
        "values": [
          "64",
          "96",
          "128",
          "192",
          "256",
          "320"
        ]
      },
      {
        "key": "engine",
        "label": "Processing location",
        "type": "select",
        "value": "browser",
        "values": [
          "browser",
          "server"
        ],
        "labels": {
          "browser": "Browser (files stay here)",
          "server": "Local server (larger files)"
        }
      }
    ],
    "files": true,
    "accept": ".mp3,.wav,.m4a,.aac,.flac,.ogg,.opus",
    "multiple": false,
    "input": false,
    "processing": "Browser or server",
    "native": true,
    "maxFileBytes": 20971520,
    "note": "Browser processing keeps files on this device. Choosing Local server sends files to this website’s own processor. Audio is processed locally with FFmpeg. Lossy conversion does not recover lost detail.",
    "hybrid": true,
    "desktopAdapter": "ffmpeg-wasm-local-v1",
    "experience": {
      "automatic": false,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Your text",
      "placeholder": "Type or paste your input…",
      "help": "Up to 1,000,000 characters. Review the settings before running.",
      "helpParts": [
        "Up to 1,000,000 characters.",
        "Review the settings before running."
      ],
      "action": "Convert file"
    },
    "mode": "explicit",
    "interactive": false
  },
  "execution": "POST /api/v1/tools/wav-to-mp3/run",
  "api": {
    "id": "wav-to-mp3",
    "name": "WAV to MP3",
    "category": "media-tools",
    "description": "Convert WAV files to MP3 with the available format settings.",
    "notes": "Browser processing keeps files on this device. Choosing Local server sends files to this website’s own processor. Audio is processed locally with FFmpeg. Lossy conversion does not recover lost detail.",
    "human_path": "/en/media-tools/wav-to-mp3/",
    "method": "POST",
    "endpoint": "/api/v1/tools/wav-to-mp3/run",
    "schema_url": "/api/v1/tools/wav-to-mp3",
    "input_schema": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "input": {
          "type": "string",
          "maxLength": 1000000,
          "default": "",
          "description": "Plain text input. File tools use files instead unless otherwise documented."
        },
        "options": {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "bitrate": {
              "type": "string",
              "description": "MP3 bitrate (kbps)",
              "default": "128",
              "enum": [
                "64",
                "96",
                "128",
                "192",
                "256",
                "320"
              ]
            },
            "engine": {
              "type": "string",
              "description": "Processing location",
              "default": "browser",
              "enum": [
                "browser",
                "server"
              ]
            }
          }
        },
        "files": {
          "type": "array",
          "maxItems": 1,
          "items": {
            "type": "object",
            "required": [
              "name",
              "base64"
            ],
            "additionalProperties": false,
            "properties": {
              "name": {
                "type": "string",
                "maxLength": 200,
                "description": "Filename only, no path."
              },
              "mime": {
                "type": "string",
                "maxLength": 150
              },
              "bytes": {
                "type": "integer",
                "minimum": 0,
                "description": "Optional decoded byte count; must match content if supplied."
              },
              "base64": {
                "type": "string",
                "contentEncoding": "base64",
                "description": "File bytes as padded base64. Use the tool-specific limits.files_bytes value for the total decoded input size."
              }
            }
          }
        }
      }
    },
    "output_schema": {
      "type": "object",
      "required": [
        "tool",
        "result"
      ],
      "properties": {
        "tool": {
          "type": "string"
        },
        "result": {
          "type": "object",
          "required": [
            "text",
            "files"
          ],
          "properties": {
            "text": {
              "type": [
                "string",
                "null"
              ]
            },
            "data": {
              "description": "Parsed JSON when the textual result is JSON."
            },
            "name": {
              "type": "string"
            },
            "mime": {
              "type": "string"
            },
            "files": {
              "type": "array",
              "items": {
                "type": "object",
                "required": [
                  "name",
                  "mime",
                  "bytes",
                  "base64"
                ],
                "properties": {
                  "name": {
                    "type": "string"
                  },
                  "mime": {
                    "type": "string"
                  },
                  "bytes": {
                    "type": "integer"
                  },
                  "base64": {
                    "type": "string",
                    "contentEncoding": "base64"
                  }
                }
              }
            }
          }
        }
      }
    },
    "processing": "Server; self-hosted native engine, no external conversion service",
    "limits": {
      "request_bytes": 31457280,
      "input_characters": 1000000,
      "files_bytes": 20971520,
      "max_files": 1,
      "timeout_seconds": 90
    }
  },
  "agent_processing": "Server; self-hosted native engine, no external conversion service",
  "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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