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Upload M4A audio, from iPhone Voice Memos to Zoom recordings, and get an accurate, editable transcript in minutes.
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Supports 20+ file formats including MP3, MP4, WAV
M4A is the AAC audio format Apple uses. iPhone Voice Memos, GarageBand exports and Zoom's audio-only recordings are all M4A files. Upload a .m4a file and Scriptivox turns the speech in it into an accurate transcript with timestamps and speaker labels, which you can edit and download as TXT, DOCX, PDF, CSV, SRT or VTT.
On an iPhone, open the memo in Voice Memos, tap Share and save it to Files, or AirDrop it to your Mac. Zoom puts an audio_only.m4a file in the folder of each local recording.
Leave it on auto-detect or pick one of more than 100 languages. Turn on speaker recognition when more than one person talks.
Read the transcript with timestamps, correct any word in the editor, then download it as TXT, DOCX, PDF, CSV, SRT or VTT.
| Specification | Value |
|---|---|
| Container | MPEG-4 Part 14 |
| Developed by | Apple / MPEG |
| Introduced | 2003 |
| Audio codecs | AAC-LC, HE-AAC, ALAC |
| Compression | Depends on codec |
| Typical bitrate | 96–256 kbps |
| Max sample rate | 96 kHz |
| Max channels | 8 |
| Gapless playback | Yes |
| Metadata / tags | MPEG-4 iTunes-style atoms |
| Approx. file size | 0.72–1.92 MB per minute |
| Licensing | Patent-licensed |
| Plays natively on | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs |
| Best for | the Apple ecosystem, music libraries, audiobooks |
Advanced AI technology meets simple, intuitive design
Powered by next-generation AI designed for seamless speech understanding worldwide
Transcripts delivered in real time and large files processed in minutes, not hours.
Your data is protected with end-to-end encryption, privacy-first safeguards, and enterprise-grade security controls.
Supports uploads of up to 10 hours, designed for uninterrupted transcription of lengthy sessions.
Global coverage with accent recognition and dialect adaptation, ensuring inclusivity worldwide.
Yes. Voice Memos are saved as .m4a files. Share the memo to Files or AirDrop it to your computer, then upload it here.
Yes, up to your plan's maximum file length. The transcript keeps timestamps all the way through, so you can jump to any part of a long memo.
You can start free, with no card, and transcribe short files every day. Pro adds unlimited transcriptions and files up to 10 hours or 5 GB each.
Yes. Turn on speaker recognition and each part of the transcript is labelled with its speaker, so interviews and meetings read like a script.
More than 100, from English, Spanish and Hindi to Arabic, Japanese and Swahili. Leave the language on auto-detect, or choose it for the best result on short files.
Files are transcribed many times faster than they play, so most are ready in a few minutes. Long recordings take a little longer, and you can close the page while they run.
Join thousands of users who trust Scriptivox for their transcription needs