M4A to MP3
Convert M4A to MP3 for free in your browser. Batch conversion, no sign-up, and your files are never uploaded.
🔒 Your files are processed on your device and never uploaded.
Frequently asked questions
How do I convert my files?
Choose or drop your files, adjust the options if you like, then press “Convert” and download the result.
Are my files uploaded to a server?
No. The conversion runs entirely in your browser, so your files never leave your device — safe for private photos and documents.
Is there a file size limit?
There is no fixed limit. Very large files (hundreds of MB) depend on your device's memory and can be slow on phones.
Is it free?
Yes — free and unlimited, with no sign-up and no watermark.
About the formats
M4A
M4A is AAC audio in an MP4 container, used by iPhone voice memos, iTunes and many apps. It sounds better than MP3 at the same size but some players and cars don't support it.
MP3
MP3 is the most widely supported audio format. Its quality is set by the bitrate, from 32 to 320 kbps: 32–64 kbps is enough for voice recordings, 128–192 kbps sounds good for most music, and 256–320 kbps is close to CD quality. A minute of stereo at 192 kbps is about 1.4 MB.