Where do m4a files come from?
M4a is the default format of the iPhone Voice Memos app and many Android recorders. If you record an interview, lecture or conversation with your phone, you almost certainly have an m4a. Many tools ask you to convert to mp3 first; with Murmel you simply upload the file as it is.
How it works
- Upload your file. Drop your m4a file into the Studio; conversion is never needed.
- Murmel transcribes. The text is ready within minutes, with speaker labels if you want them.
- Correct and export. Replay the audio next to the text, adjust where needed and export to Word, text or subtitles.
Dutch model, Dutch servers
Murmel runs on a model trained specifically for Dutch speech that makes fewer errors than open-source alternatives such as Whisper in a public benchmark. Processing happens on servers in the Netherlands, your file is automatically deleted after 7 days and is not used for AI training unless you explicitly opt in.
What does it cost?
Prepaid credits cost €1 per 50 minutes of audio (excl. VAT), available from €5 and valid for 6 months: a one-off file costs cents, no subscription. Transcribing regularly? Try 14 days for €0.01 first, then from €9 per month (excl. VAT), cancel monthly.
Frequently asked questions
How do I get an m4a from my iPhone into Murmel?
Open Voice Memos, share the recording to the Files app, AirDrop or your email, then upload the file in the Murmel Studio in your browser. No conversion needed.
Do I need to convert m4a to mp3 first?
No. Murmel reads m4a directly, without the quality loss of an extra conversion step.
What does converting a m4a file to text cost?
With prepaid credits you pay €1 per 50 minutes of audio (excl. VAT), available from €5 and valid for 6 months. Or try 14 days for €0.01 and then from €9 per month (excl. VAT), cancel monthly.
Where is my file processed?
On servers in the Netherlands. Your file never leaves the EU, is automatically deleted after 7 days and is not used for AI training unless you explicitly opt in.