How to convert M4A to text

Where your M4A file probably came from

• iPhone or Mac Voice Memos. Every voice memo is an M4A file.
• QuickTime Player on a Mac. File, New Audio Recording saves M4A.
• Other apps and devices. Many recorders, messaging apps and audio editors export M4A because it's small and sounds good.

Knowing the source helps: if it's a voice memo, you may already have a transcript without doing anything.

M4A is not a special case for transcription. The speech model hears the same sound whether it arrives as M4A, MP3 or WAV. What changes accuracy is the recording itself: how close the microphone was, how much noise there was, and whether people talked over each other. So the steps below are about picking the right tool, not wrestling with the format.

Method 1: Use Apple's built-in transcript (Voice Memos)

On iPhone 12 or later with iOS 18 or newer, Voice Memos transcribes recordings in English and several other languages (not in every region).

1. Open Voice Memos and tap the recording.
2. Tap More (three dots), then View Transcript to read it, or Copy Transcript to copy it all.
3. Paste it into Notes, Mail or a document.

On a Mac with Apple silicon and macOS 15 or later, open the memo in Voice Memos and click the Transcription button. Older recordings get transcribed when you open them.

The limits: no speaker labels, copying is the only real export, and it only works for recordings in Voice Memos. Our voice memo transcription guide goes deeper.

Method 2: Hark (free, any M4A, with speaker names)

Hark is a free desktop app for Windows, Mac and Linux that transcribes on your computer. It reads M4A directly, and it's useful when the file has more than one person in it, when it's long, or when you want the transcript on a Windows or Linux PC.

1. Get the M4A onto your computer (AirDrop, iCloud Drive, email, or a USB cable).
2. Download Hark and sign in with a free account (an emailed code, no card).
3. Drag the M4A onto Hark, or use File > Import.
4. The first time, Hark downloads its speech models (about 730 MB). After that it works offline.
5. Hark transcribes the audio and splits it by speaker. Name each voice once, and Hark recognizes that person next time.
6. Click a word to hear it, fix anything that's off, and export the transcript.

Hark transcribes English only and has no limits on length or number of files. The audio stays on your computer.

Method 3: Word's Transcribe

Microsoft 365 subscribers can upload an M4A in Word for the web or Word for Microsoft 365 on Windows: Home > Dictate > Transcribe > Upload audio. Word labels speakers, and you can rename them. As of October 2026, the allowance is 300 minutes of uploads per month, processed in Microsoft's cloud.

Method 4: Online transcription services

Almost every web transcription service accepts M4A. They shine for non-English audio, subtitles and human-checked transcripts. The trade-off is that your audio is uploaded to their servers, and free tiers are usually small.

Which method should you use?

In short: a solo voice memo on a recent iPhone needs nothing more than Apple's transcript. A conversation with several people, a long recording, or a file you're working with on Windows or Linux is where Hark helps. Audio in a language other than English needs Apple's transcript, Word or an online service.

Transcribing a batch of M4A files

Got a folder full of memos from a research project, a semester of lectures or a year of one-on-ones? Copying transcripts out of Voice Memos one at a time gets old fast. In Hark you can drag several M4A files in at once; each becomes its own entry with its own transcript, and because the voices you name are remembered, the same people are suggested across every file. The Meetings page then lets you search all of them.

Because transcription runs on your computer, a big batch takes computer time rather than money, and there's no monthly cap to run into. A recent laptop handles it fine; just leave Hark running until the queue is done.

If a tool won't accept your M4A

Rarely, a tool only takes MP3 or WAV. You can convert on a Mac by opening the file in Music and creating an MP3 version, or anywhere with a free player like VLC (Convert / Save). Keep the original M4A; then follow the MP3 to text steps. If the problem is file size, not format, a tool without limits is easier than splitting the recording.

Tips for better M4A transcripts

• Record close to the speaker. A phone on the table in the middle of a group works; one across the room doesn't.
• Use the original file. Each re-encode (for example M4A to MP3 to M4A) loses a little detail the speech model could have used.
• Check names and jargon against the audio before you share the text.
• Get consent. If you recorded other people, recording laws vary and some places require everyone's agreement.

For every option side by side, see how to transcribe an audio recording to text.