{"$schema":"https://toolsly.tools/schemas/tool-manifest-v1.json","generated":"2026-06-03T07:09:03.923Z","discovery":{"catalog":"https://toptool.io/tools.json","llmsTxt":"https://toptool.io/llms.txt","sitemap":"https://toptool.io/sitemap.xml"},"relatedTools":[{"slug":"mp3-to-aac","name":"MP3 to AAC","url":"https://toptool.io/mp3-to-aac"},{"slug":"audio-trimmer","name":"Audio Trimmer","url":"https://toptool.io/audio-trimmer"},{"slug":"aac-to-wav","name":"AAC to WAV","url":"https://toptool.io/aac-to-wav"},{"slug":"m4a-to-mp3","name":"M4A to MP3","url":"https://toptool.io/m4a-to-mp3"},{"slug":"mp3-to-m4a","name":"MP3 to M4A","url":"https://toptool.io/mp3-to-m4a"},{"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"}],"kind":"converter","slug":"aac-to-mp3","name":"AAC to MP3","description":"Convert AAC or M4A audio to MP3 — free online, no upload.","longDescription":"Re-encode an AAC or M4A file as a variable-bitrate MP3 using LAME. Useful when you have iTunes-style downloads or AAC podcasts that need to play on devices stuck with MP3-only support. Both raw .aac and .m4a (AAC in an MP4 container) are accepted. Conversion runs entirely in your browser via ffmpeg.wasm — nothing is uploaded. Expect a few seconds for a 5-minute song; longer files may take a minute or two.","category":"audio","categoryName":"Audio","keywords":["aac to mp3","convert aac to mp3","aac to mp3 converter","aac to mp3 online","aac to mp3 free","aac to mp3 online free","change aac to mp3","aac mp3 converter","free aac to mp3","online aac to mp3 converter","m4a to mp3"],"url":"https://toptool.io/aac-to-mp3","runsOn":"client","multiple":false,"batch":false,"input":{"type":"file","extensions":[".aac",".m4a"],"mimeTypes":["audio/aac","audio/mp4","audio/x-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/aac-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."}}