M4A to MP3

About converting M4A to MP3

M4A is the audio format Apple uses. Your iPhone voice memos are M4A. So are songs bought on iTunes, many podcast downloads, and audio saved from WhatsApp or a screen recorder on a Mac.

Inside, an M4A holds AAC audio. It sounds good and the files are small — but not everything can play it. Old car stereos, cheap MP3 players, some Windows programs, some websites and many upload forms want an MP3.

This tool changes the M4A into an MP3 that plays everywhere.

Everything happens on your device

A voice memo is often private: a meeting, a lesson, a doctor's advice, a family moment. Most converter sites ask you to upload it to their server first.

This one does not. The converter is a real audio engine (ffmpeg) compiled to WebAssembly and run inside your browser:

• Private — the recording never leaves your device
• Fast — no upload, no queue; a long memo starts at once
• No sign-up, no watermark, no file count limit

The engine is about 30 MB and downloads once, the first time you use it. Your browser keeps it after that.

It runs in a background worker, so you can switch to another tab while a long file converts. Just keep this tab open.

Choosing the bitrate

• 320 kbps — best quality. Use it for music.
• 192 kbps — the default. Good for almost everything.
• 128 kbps — plenty for voice memos, lectures and podcasts, and the smallest file.

M4A is already compressed, and MP3 compresses again. So pick a bitrate at least as high as the original — for music, 256 or 320 kbps keeps it sounding the same. For speech, 128 kbps is fine.

Getting a voice memo off your iPhone

1. Open Voice Memos and tap the recording
2. Tap the ⋯ (more) button, then Share
3. Choose Save to Files, or AirDrop / email it to your computer
4. Open this page and drop the M4A file in the box

You can also open this page on the iPhone itself: tap the upload box and pick the memo from Files.

What people use it for

• Turning iPhone voice memos into MP3s that any computer can play
• Playing iTunes music on an old MP3 player or in an older car
• Uploading a recording to a site or a form that only accepts MP3
• Sending an interview or a lecture to someone on Windows or Android
• Making audio for a video editor or a slideshow tool that does not read M4A

Good to know

• Copy-protected songs (old iTunes files with DRM, .m4p) cannot be converted — no in-browser tool can read them
• It also converts AAC, WAV, FLAC, OGG and most other audio — the result is still an MP3
• An M4A video (rare) works too; only the sound is kept
• To keep only part of the memo, cut it with Audio Trim afterwards

Frequently asked questions

Is it free, and is there a watermark?

It is free, there is no sign-up, and nothing is added to your audio.

Is my recording uploaded?

No. The conversion runs on your own device, inside this page. The file never reaches a server.

Is MP3 worse than M4A?

At the same bitrate M4A sounds slightly better. At 192 kbps or more, the difference is very hard to hear. You change to MP3 for compatibility, not for quality.

Does it work on a phone?

Yes, in a modern browser on iPhone or Android. Very long files are faster on a computer.

How to use it

• Click Click to upload, or drag your M4A file onto the box
• Leave MP3 selected as the format
• Pick the quality — 128 kbps for voice, 192 or 320 for music
• Press Convert to MP3 — the first run downloads the converter
• Play the result, then click Download MP3

Related tools

• WAV to MP3 — shrink large uncompressed recordings
• Audio Converter — any format to MP3, WAV, M4A, OGG or FLAC
• Audio to Text — type up a voice memo automatically
• Audio Trim — keep only the part you need
• Change Audio Volume — make a quiet memo louder
• MP4 to MP3 — take the sound out of a video