AAC to Text: Transcribe AAC Audio Online
AAC to text is a direct upload here: drop in your .aac file and get an editable transcript with timestamps and speaker labels, usually within minutes. Files up to 30 minutes are free without an account (120 minutes a month); Pro at €12/month handles files up to 10 hours. AAC inside M4A or MP4 files works just the same.
- Upload or paste the link
- Choose the language or let it detect
- Review in the editor and export
Drop audio or video here
MP3, M4A, WAV, OGG, FLAC, MP4, MOV, WebM, MKV · up to 5 GB on Pro
Free plan: files up to 30 minutes, 120 minutes a month. No account needed. By uploading you agree to the terms and the privacy policy.
AAC to Text: Transcribe AAC Audio Online
| Full name | Advanced Audio Coding, part of the MPEG-2 and MPEG-4 standards |
|---|---|
| Compression | Lossy; designed as the successor to MP3 |
| Profiles | AAC-LC for general use, HE-AAC for low-bitrate streaming |
| Raw .aac files | Use ADTS framing, without the M4A/MP4 container |
| Extension and MIME type | .aac · audio/aac |
| Typical sources | Recorder apps, internet radio captures, audio extracted from MP4 videos |
Example: a short AAC transcript
Speaker 1Good morning, it's ten past eight and you're listening to the city report.
Speaker 1Roadworks on the ring road continue this week, so expect delays near the north exit.
Speaker 2And if you're heading out tonight, the forecast says rain from about six.
AAC, M4A and MP4: same audio, different wrappers
AAC is a codec, not a container. Most AAC audio you meet lives inside an M4A file (audio only) or an MP4 video. A bare .aac file is the same audio stream without that wrapper, which is common in radio recordings and some recorder apps.
You can upload any of them. There's no need to rewrap or convert the file before transcription.
Low-bitrate streams and radio recordings
HE-AAC is built to sound reasonable at low bitrates, which is why internet radio uses it. Speech in such recordings usually transcribes well; music beds and jingles under the voice make it harder.
If a tool you use later needs MP3, the free AAC to MP3 converter on this site runs in your browser, so nothing is uploaded.
Free and Pro at a glance
- Free: files up to 30 minutes, 120 minutes per month, timestamps, speaker labels, TXT, SRT and VTT
- Pro (€12/month): 3,000 minutes per month, files up to 10 hours
- Pro: DOCX, PDF and Markdown export, translation, AI summary, chapters and action items, API
Use cases
- Talk radio segments you recorded for reference
- Recordings from apps that save raw AAC
- Audio tracks pulled out of MP4 videos
- Lectures and talks distributed as AAC
- Interview audio from a phone recorder
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Frequently asked questions
Is AAC to text free?
Yes. Without an account you can transcribe files up to 30 minutes, up to 120 minutes per month.
What's the difference between AAC and M4A?
AAC is the audio codec; M4A is a container that usually holds AAC. Both upload directly.
Do I need to convert AAC to MP3?
No. Convert only if another app requires MP3, using the in-browser converter on this site.
How long can an AAC file be?
Up to 30 minutes on the free plan and up to 10 hours with Pro.
What happens to my audio?
It's never used to train models and is deleted after your chosen retention period.