AAC to Text Converter
Transcribe AAC audio files to text. The default format for Apple devices, broadcast audio, and streaming recordings.
Drag & drop your file here
or browse files
Max file size: 500 MB
AAC transcription without a conversion step
AAC quietly replaced MP3 as the default for compressed audio. It is what Apple devices record, what YouTube and streaming platforms serve, and what digital broadcast is delivered in — which means a lot of speech ends up in .aac or AAC-in-M4A files.
TranscribeX transcribes AAC directly. Converting to MP3 first is a common habit and a bad one: re-encoding lossy audio into another lossy format discards detail that the speech model could otherwise have used.
Enable speaker detection for interviews, panels, and recorded calls and each voice is labelled in the output. Export as TXT for notes, quotes, or show notes, or as SRT with timestamps when the audio accompanies video that needs captions.
3 simple steps
Upload the AAC file
Drag in an .aac recording from a phone, recorder, or streaming export.
Choose language and speakers
Set the spoken language and enable speaker detection for multi-person audio.
Export the transcript
Download plain TXT or a timestamped SRT file — free and instant.
Why TranscribeX?
Native support for AAC, the standard for Apple and broadcast audio
Handles both raw .aac streams and AAC inside M4A containers
Speaker detection for interviews and panel recordings
SRT export with timestamps for captioning
50+ languages with automatic punctuation
Files up to 500 MB per upload
No conversion to MP3 needed first
Free, no registration, no limits
Frequently asked questions
AAC is the default audio codec for Apple devices, YouTube, most streaming platforms, and digital broadcast. It delivers better quality than MP3 at the same bitrate, which is why it replaced MP3 in most modern workflows.
Nearly. M4A is a container that almost always holds AAC audio. Both are supported — upload whichever file extension you have.
No, and you should not. Converting re-compresses already-compressed audio and can only lose detail. Upload the AAC directly.
Low-bitrate AAC (under 64 kbps) can blur consonants and cost you some accuracy. Anything at normal streaming quality or above transcribes cleanly.
Yes. Streaming and broadcast exports are usually AAC, and they transcribe the same as any other recording — with speaker labels if several people are talking.