Convert AAC to VTT

Create WebVTT caption files from your AAC audio for HTML5 video players. Convert streaming content to standards-compliant web captions.

HTML5 ready
5-min turnaround
Web compatible
Audio
Video
DOCX
SRT/VTT
PDF
53+ Languages
About This Format

Understanding AAC files

What is a AAC file?

High-quality compressed audio, Apple's preferred format

Advanced Audio Coding (AAC) is the default encoding used by Apple iTunes and the iTunes Music Store. It is a compressed audio file similar to an .MP3 file, but offers several performance improvements; examples include a higher coding efficiency for both stationary and transient signals, a simpler filterbank, and better handling of frequencies above 16 kHz; maintains quality nearly indistinguishable from the original audio source.

Common Uses

  • iTunes music
  • Apple podcasts
  • Streaming audio
  • Professional audio distribution

Audio Quality

Superior quality to MP3 at equivalent bitrates

Transcription Tips for AAC

  • AAC at 128kbps+ yields excellent transcription accuracy
  • Supports clear speech frequencies well

Where AAC Files Come From

  • Apple iTunes Store
  • Apple Music
  • iOS voice recordings
  • Podcast apps
10x
Faster than real-time
Get your AAC VTT in minutes
99%
Accuracy rate
Industry-leading AI for AAC files
53+
Languages
Captions in any language
30+
Export formats
VTT, SRT, text, and more
How It Works

Convert AAC to VTT in 6 steps

Step 1

Create account

Sign up for Sonix's free trial. Includes 30 minutes free.

Step 2

Upload file

Upload your AAC file from your computer or cloud storage.

Step 3

Select language

Choose from 53+ languages spoken in your file.

Step 4

Auto-transcribe

Sonix AI transcribes and timestamps your AAC audio.

Step 5

Edit captions

Fine-tune caption timing and text with our editor.

Step 6

Export VTT

Download your AAC captions as a WebVTT file.

Common Questions

Everything about AAC to VTT

Can I convert AAC to VTT captions?

Yes! Sonix transcribes AAC files from any source and exports to WebVTT format for HTML5 video and web accessibility.

What's the advantage of AAC for VTT captions?

AAC's superior compression preserves audio quality in smaller files, helping transcription accuracy. This translates to more accurate VTT captions.

Can I style VTT captions from AAC?

Yes! WebVTT supports CSS styling for fonts, colors, and positioning. Sonix exports clean VTT files you can customize.

How do I add AAC VTT captions to my website?

Add a <track> element to your HTML5 video pointing to your VTT file. The browser handles caption display automatically.

Can I create multi-language VTT from AAC?

Yes! Transcribe your AAC once, then use Sonix's translation feature to create versions in 50+ languages.

Do AAC VTT captions work on mobile?

Yes! WebVTT is supported on all modern mobile browsers including iOS Safari and Android Chrome.

Why Sonix

Web-ready VTT from AAC files

HTML5 Native

VTT is the web standard for captions, supported by all modern browsers.

Styleable

Apply CSS styling for colors, fonts, positioning, and more.

Precise Timing

Word-level timestamps ensure perfect sync with your video.

Universal Support

Works with all HTML5 video players and web platforms.

Related

More ways to convert AAC files

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Other file formats

AMR to text
WEBA to text
OGG to text
WMA to text
XSPF to text
MTS to text
AIFC to text
MP3 to text
CAF to text
GSM to text
See all supported file formats
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