Is converting MP3 to M4A free?
Yes. This tool is completely free with no limits, watermarks or sign-up requirements.
Free MP3 audio converter
Convert MP3 to M4A
Convert MP3 audio to M4A for free, right in your browser. Upload a .mp3 file, pick M4A from the output menu and the converted audio appears instantly in a player you can listen to before downloading. Everything is re-encoded locally — no uploads, no accounts, no watermarks.
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What is MP3 to M4A conversion?
MP3 (MP3) and MPEG-4 Audio (M4A) are two popular audio formats, but not every player or editor reads them all. This free converter decodes your .mp3 file and re-encodes it as a valid .m4a file. The whole conversion runs in your browser, so your audio stays private.
How it works
- 1Upload a .mp3 audio file.
- 2Choose M4A from the output format menu — the conversion starts automatically.
- 3Preview the converted audio in the browser player.
- 4Download the converted .m4a file. No signup needed.
Why this tool
- 100% private. The conversion runs entirely in your browser. Your audio file is never uploaded to a server.
- Free, no signup. No accounts, no watermarks, no file size limits. Convert as many audio files as you like.
- 7 output formats. Pick AAC, AIFF, FLAC, M4A, MP3, WAV or WMA from the dropdown next to the preview.
Frequently asked questions
Are my audio files uploaded to a server?
No. The conversion happens entirely in your browser with FFmpeg WASM, so your MP3 file never leaves your device.
How do I convert MP3 to M4A?
Upload a .mp3 file, choose M4A from the output menu and the converted audio is previewed immediately. Click Download to save the .m4a file.
What output formats can I choose?
AAC, AIFF, FLAC, M4A, MP3, WAV, WMA — the dropdown next to the preview switches between them.
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