{"$schema":"https://toolsly.tools/schemas/tool-manifest-v1.json","generated":"2026-06-02T15:45:19.721Z","discovery":{"catalog":"https://toptool.io/tools.json","llmsTxt":"https://toptool.io/llms.txt","sitemap":"https://toptool.io/sitemap.xml"},"relatedTools":[{"slug":"mp3-to-m4a","name":"MP3 to M4A","url":"https://toptool.io/mp3-to-m4a"},{"slug":"audio-trimmer","name":"Audio Trimmer","url":"https://toptool.io/audio-trimmer"},{"slug":"aac-to-mp3","name":"AAC to MP3","url":"https://toptool.io/aac-to-mp3"},{"slug":"m4a-to-wav","name":"M4A to WAV","url":"https://toptool.io/m4a-to-wav"},{"slug":"wav-to-mp3","name":"WAV to MP3","url":"https://toptool.io/wav-to-mp3"},{"slug":"ogg-to-mp3","name":"OGG to MP3","url":"https://toptool.io/ogg-to-mp3"},{"slug":"flac-to-mp3","name":"FLAC to MP3","url":"https://toptool.io/flac-to-mp3"},{"slug":"mp3-to-aac","name":"MP3 to AAC","url":"https://toptool.io/mp3-to-aac"}],"kind":"converter","slug":"m4a-to-mp3","name":"M4A to MP3","description":"Convert M4A audio (AAC in MP4) to MP3 — free online, no upload.","longDescription":"Re-encode an M4A file as a variable-bitrate MP3 using LAME. Useful for iTunes / Apple Music downloads, voice memos, or any AAC-in-MP4 audio you need to play on devices that only handle MP3. Conversion runs entirely in your browser via ffmpeg.wasm — your file never touches a server. Expect a few seconds for a 5-minute song; longer files may take a minute or two.","category":"audio","categoryName":"Audio","keywords":["m4a to mp3","convert m4a to mp3","m4a to mp3 converter","m4a to mp3 online","m4a to mp3 free","m4a to mp3 online free","change m4a to mp3","m4a mp3 converter","free m4a to mp3","online m4a to mp3 converter","itunes to mp3"],"url":"https://toptool.io/m4a-to-mp3","runsOn":"client","multiple":false,"batch":false,"input":{"type":"file","extensions":[".m4a"],"mimeTypes":["audio/mp4","audio/x-m4a","audio/m4a"]},"output":{"type":"file","extension":".mp3","mimeType":"audio/mpeg"},"options":[{"type":"select","key":"quality","label":"MP3 quality","defaultValue":"2","choices":[{"value":"0","label":"VBR best (~245 kbps)"},{"value":"2","label":"VBR high (~190 kbps)"},{"value":"4","label":"VBR medium (~165 kbps)"},{"value":"6","label":"VBR low (~115 kbps)"},{"value":"9","label":"VBR lowest (~65 kbps)"}],"help":"Lower numbers = better quality and larger files."}],"invocation":{"webUi":"https://toptool.io/m4a-to-mp3","api":null,"notes":"Currently runs client-side in the user's browser. Drop a file on the UI at `webUi` and download the converted result. A remote MCP/REST API is planned."}}