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M4A to SRT

M4A to SRT, iPhone voice memos to subtitles

Turn an M4A audio file or iPhone Voice Memo into an SRT subtitle file on your own computer. SnailText transcribes the speech and writes the SRT with phrase-level timing - no upload and no per-minute meter.

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Generate SRT and VTT locally, nothing uploaded

No account · Nothing uploaded

Convert M4A to an SRT subtitle file

M4A is the audio format iPhone Voice Memos, macOS Voice Memos, and iTunes purchases use by default. SnailText reads the AAC audio inside, transcribes the speech with the Whisper model, and writes a phrase-level SRT, all on your machine.

You get a standard .srt file ready to attach to a video or use in any subtitle editor. M4A works immediately with no extra codec download.

How to convert M4A to SRT

  1. Open the Transcribe files screen in SnailText.
  2. Add your M4A or Voice Memo file (or a folder of them).
  3. Choose SRT as the output before you run it.
  4. Run it. The .srt file is saved next to your audio.

Try it on your own files

Download for Mac

Generate SRT and VTT locally, nothing uploaded

M4A to SRT free, without uploading the file

Online M4A-to-SRT tools upload your audio to a server. SnailText does it locally: the file stays on your machine, there is no length limit, and the free tier has no watermark. M4A works immediately with no extra codec download.

If you only want the plain transcript of an M4A rather than a subtitle file, the M4A to text page covers that. If you need VTT instead of SRT, the M4A to VTT page covers that.

M4A to SRT FAQ

How do I convert an M4A Voice Memo to SRT?
Install SnailText, open Transcribe files, add your M4A or Voice Memo file, choose SRT as the output, and run it. It generates the SRT locally with the Whisper model, no account and no per-minute charge.
Can SnailText transcribe iPhone Voice Memos exported as M4A?
Yes. Export the Voice Memo from your iPhone to your Mac or PC, then add the M4A to SnailText. Choose SRT as the output and run it. The transcription and subtitle file are generated locally.
What is the difference between M4A to SRT and M4A to text?
M4A to SRT produces a timed subtitle file (.srt) with start and end times per phrase. M4A to text produces a plain transcript with no timestamps. SnailText does both, you just pick the output before the run.
Does SnailText burn the subtitles into the video when I use M4A to SRT?
No. SnailText writes a separate SRT and VTT file and does not hardcode captions into the video. That keeps the subtitles editable and lets you attach them in any player or editor. If you want them burned in, overlay the file in a video editor afterward.

More ways to transcribe and caption

Same format, other output

M4A to VTT →

Subtitle hubs

SRT — other formats

VTT — other formats

All transcription formats →

Generate an SRT from your M4A

Free local subtitle generation, no account needed. SRT and VTT files on Mac and Windows.

Download for Mac Or for Windows →