M4A to Text Converter
Upload an M4A, the format your iPhone records in, and get a transcript with timestamps and speakers. Click any line to hear it, then export.
MP3, WAV, M4A or OGG · up to 30 minutes
Upload a recording you have the rights to transcribe. The transcript is yours; the audio is not kept after processing.
Tap any line to hear it. The line under the playhead lights up as the audio plays. This is what your transcript will look like.
01—How it works
How to Convert M4A to Text in 3 Steps
No software to install and no detour through MP3. The file your phone recorded goes in as it is, and the transcript opens on its own page with the player at the top and the export buttons where you expect them.
- 1
Upload your M4A
Drop a file of up to thirty minutes. A voice memo shared straight out of the Voice Memos app is fine as it is. The length is read before anything uploads, and the page tells you whether today's conversion is free.
- 2
Transcribe M4A to text
Press Transcribe. The engine listens once, writes every word down with the second it was spoken, and separates the speakers. A ten-minute memo usually comes back in under a minute.
- 3
Check it against the audio, then export
The transcript opens beside a player. Click any line to hear it, search for a phrase, rename the speakers, and download plain text, text with timestamps, SRT or VTT.
How long does it take?
About a tenth of the recording's length. A three-minute memo is back in seconds and a thirty-minute interview in a few minutes. The page shows a timer while it works.
02—The format
What Is an M4A File?
An M4A is AAC audio inside an MP4 container, and it is the default recording format on Apple devices. iPhone voice memos, most iPhone recording apps, QuickTime on a Mac, and WhatsApp voice notes saved from an iPhone all come out as M4A, which is why so many people arrive at an M4A to text converter with one.
Compressed or lossless
Voice Memos records in Compressed quality by default, about 64 kbps mono AAC, and that is more than enough for transcription. The Lossless setting records ALAC instead, with the same .m4a extension but several times the size, so a thirty-minute memo can pass the 50 MB limit. If a file is refused for size, switch the app back to Compressed and share it again.
Mono, close, and usually clean
A memo recorded with the phone near your mouth is the easiest audio there is to turn into text. A meeting recorded with the phone in the middle of the table is the hardest. The format is the same in both cases; the distance to the microphone is what changes the transcript.
What the file name becomes
The recording's name, whether it is still New Recording 12 or something you typed in, becomes the title of the transcript and the name of every export. Renaming the memo on the phone before you share it is the quickest way to keep things tidy, and you can rename the transcript afterwards too.
Do I need to convert M4A to MP3 first?
No, an M4A does not need to become an MP3 or a WAV before transcription. Upload the file your phone gave you. This page simply expects M4A and accepts the rest.
03—Click a line
Click Any Line to Hear It
A forty-minute interview memo is a long thing to scrub through for one sentence. Here the transcript and the audio are one thing on one page, and every line knows the second it belongs to.
The transcript follows the playhead
While the memo plays, the line being spoken is highlighted and kept in view. Click a different line and playback jumps there. Verifying a quote takes two seconds.
Search, then listen
Type a phrase and the transcript filters to the lines that contain it. Click one and you are hearing that exact moment.
Timestamps from the audio itself
Each line carries the second it starts, measured from the file rather than estimated from reading speed, so a timestamp you paste into your notes lands on the right moment.
Speakers you can rename
Two voices come back as Speaker 1 and Speaker 2. Rename them once and every line and every export updates.
04—What you get
What You Get From an M4A Transcript
One conversion produces four files, all built from the same timed segments, so plain text, captions and the timestamped version never disagree with each other.
Plain text
Paragraphs split where the speaker paused or changed, ready to paste into notes, a document or an email.
Timestamped text and captions
The same lines with their start times, or SRT and VTT files that drop straight onto a video track.
Speaker labels
Interviews and calls come back with every turn attributed, and you decide what the speakers are called.
Where the transcript lives
Each transcript stays in your history for thirty days with its audio, so you can reopen the page, play it again and export later. The memo you uploaded is not kept anywhere else, and deleting the transcript removes both.
05—Off the phone
Where M4A Files Come From, and How to Get Them Off the Phone
M4A is the format things get recorded in, which means the file is usually still on a phone. Each of the four common sources has a short path to a file you can upload.
iPhone Voice Memos
Open the recording, tap the More button, choose Share, then Save to Files, or AirDrop it to a Mac. Upload it from Files or the Mac and the memo's name becomes the transcript's title.
WhatsApp voice notes
On an iPhone, press and hold the voice note, choose Forward or Share, then Save to Files; the result is an M4A. Notes from an Android phone arrive as OPUS or OGG, and those upload just the same.
Zoom and FaceTime recordings
A call recorded locally leaves an M4A audio track next to the video. A two-person call comes back with every turn attributed to a speaker, which is the record of who agreed to what.
Android recorders and Mac QuickTime
Many Android recording apps default to M4A too, and QuickTime on a Mac saves audio recordings as M4A. On a Mac, drag the file straight into the browser.
What it does not do
It will not transcribe words that were never audible, it does not translate the audio itself, and it is not live captioning. It works on M4A files you already have, up to thirty minutes each; split a longer memo at a natural pause and convert it in two parts.
06—Compared
M4A to Text Converter vs. the Built-in iPhone Transcript vs. Typing It Out
Since iOS 18, the Voice Memos app can show a transcript of its own recordings on an iPhone 12 or later. It is worth knowing when that is enough and when it is not.
| M4A to text converter (this page) | Built-in Voice Memos transcript | Typing it yourself | |
|---|---|---|---|
| Works on | Any M4A from any source | Memos on iPhone 12+ with iOS 18 | Anything |
| Timestamps | By hand | ||
| Speaker labels | By hand | ||
| Click a line to hear it | |||
| SRT and VTT export | By hand | ||
| Languages | Most widely spoken languages | Ten | Any |
If a one-minute memo only needs to become a sentence in your notes, the built-in transcript is the quickest way there. Once the recording runs longer than a few minutes, has a second voice, needs timestamps or captions, or came from a phone that does not offer the feature, use this page.
07—Questions
Frequently Asked Questions
What is an M4A file?
AAC audio in an MP4 container, and the default recording format on Apple devices. iPhone voice memos, most iPhone recording apps, QuickTime and WhatsApp voice notes saved from an iPhone all produce M4A files.
Can you convert M4A to text?
Yes. Upload the M4A, press Transcribe, and the transcript opens with timestamps and speaker labels. Click any line to hear it, then download it as text or subtitles.
How do I transcribe an iPhone voice memo?
In Voice Memos, open the recording, tap More, choose Share and then Save to Files. Upload that file here, press Transcribe, and the transcript is usually ready in under a minute with timestamps and speakers.
Is the M4A to text converter free?
Every signed-in account gets three free conversions a day of up to ten minutes each, with every export format. Paid plans remove the daily cap, allow files up to thirty minutes, and bill by the minute in credits. The rate is on the pricing page.
Does it work with WhatsApp voice notes?
Yes. Saved from an iPhone they are M4A files and upload directly. Saved from an Android phone they are OPUS or OGG, and those are accepted too.
Do I need to convert M4A to MP3 first?
No. Upload the M4A as it is. Converting it first only adds a step and cannot make the transcript better.
Why is my voice memo over the size limit?
It was probably recorded with the Lossless setting, which stores far more data under the same .m4a extension. Switch Voice Memos to Compressed quality and share the recording again, or split a long memo into two parts.
How is this different from the transcript built into Voice Memos?
The built-in transcript is plain text for memos recorded on a recent iPhone in one of ten languages. This converter takes an M4A from any source, adds timestamps and speaker labels, lets you click any line to hear it, and exports SRT and VTT for captions.
08—More tools
More Audio Tools
M4A is what phones record; the rest of AnyVoice handles the other formats and everything you might do with the transcript.