Convert M4A to MP3

Convert M4A files to MP3 locally, completely free and with maximum privacy.

Drag and drop your files here

or click to browse local files (large files supported, limited only by browser RAM)

Upload Files

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How to convert M4A to MP3

Drop your .m4a files above, or click Upload Files. You can add many files at once.
MP3 is already selected as the output. Open the settings (gear icon) to fine-tune the result.
Click Convert All. FFmpeg runs inside your browser through WebAssembly; nothing is uploaded.
Download your .mp3 files as soon as each one finishes.

What to know about M4A to MP3 conversion

MP3 is lossy, so files become much smaller than the M4A source. 192 kbps or higher is transparent for most listeners.
You can choose the bitrate, sample rate and channels (mono, stereo or a 3D spatial effect).

M4A vs MP3

Feature	M4A (MPEG-4 Audio)	MP3 (MPEG-1 Audio Layer III)
Compression	lossy or lossless	lossy
Best for	iTunes, iPhone ringtones and podcasts	music libraries and playback on any device
Opens in	Apple devices, browsers and most media players	every phone, car stereo, browser and media player

M4A (MPEG-4 Audio): An audio-only file extension for MPEG-4 files, commonly encoded with AAC or ALAC codecs for high quality.

MP3 (MPEG-1 Audio Layer III): The most popular lossy audio compression format, which revolutionized digital music sharing.

Conversion options

Bitrate from 96 to 320 kbps
Sample rate: 22.05, 44.1 or 48 kHz
Mono, stereo or 3D spatial audio
Playback speed (0.5× to 2×)

Frequently asked questions

Is it safe to convert M4A to MP3 here?

Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.

Is there a file size limit?

There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.

Can I convert several M4A files at once?

Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.

Related conversions

Need the opposite? Convert MP3 to M4A.

Convert M4A to other formats

Convert other formats to MP3

See every M4A converter and MP3 converter, or browse the full converter directory.