Free tool

M4A to MP3 converter voice memos and Apple tracks as MP3.

Drop M4A files, iPhone voice memos included, and download them as MP3. Pick the bitrate, keep stereo or go mono, several at once.

Drop audio files here or click to choose. MP3, WAV, M4A, AAC, OGG, FLAC, AIFF, or the sound of a video. Several at once is fine.

Convert to Bitrate MP3, M4A and OGG Channels

M4A to MP3 converter at a glance

content.win converts M4A to MP3, a folder of voice memos in one drop, with no daily cap.

Works with: M4A files from Voice Memos, iTunes, GarageBand, QuickTime and Android recorders; AAC inside an MP4 too.
Comes back as: MP3, the full length, named after the original.
Runs: In your browser.
Limits: No daily limit and no cap on how many files.
Price: Free. No account, no watermark.

Drop the M4A files in. Several at once is fine.
Pick a bitrate. 128 kbps for speech, 192 for music, 320 when every detail matters. Mono halves the size of a spoken recording.
Download the MP3 files. Each has its own player and Download button; one button takes them all.

Voice memos: A memo recorded on an iPhone plays on any phone, in any app, and goes through any messaging app as MP3.
Music: Tracks bought from iTunes years ago play in car stereos, MP3 players and older software.
Transcription and editing: Many tools and editors accept MP3 and not M4A.
Windows: M4A needs a codec on older Windows machines; MP3 plays everywhere.

M4A holds AAC, which is a little more efficient than MP3. Converting at 192 kbps or above keeps the difference inaudible; at 128 kbps choose mono for speech.
A voice memo is usually mono at 64 kbps: 128 kbps mono MP3 keeps all of it in a file about the same size.

Does M4A to MP3 lose quality?

One re-encode from AAC to MP3. At 192 kbps or above almost nobody can hear the difference; for a voice memo, 128 kbps mono is plenty.

Can I convert an iPhone voice memo?

Yes. Share the memo to Files or Mail, then drop the M4A here.

How big will the MP3 be?

About 1 MB per minute at 128 kbps, 1.4 MB at 192, 2.3 MB at 320. Mono halves those.

Can I convert several files at once?

Yes. Drop them all; each comes back named after the original, and one button downloads the lot.

Does it work on a Mac or an iPhone?

Yes. It runs in the browser, so a Mac, iPhone, iPad, Windows or Android device all work.