Convert AU to VTT

Sonix transcribes your AU file and exports it as WebVTT captions perfect for HTML5 video and web platforms.

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

Understanding AU files

What is a AU file?

Audacity project audio chunks

Audacity, an open source audio editor, breaks long tracks into small pieces so it can edit them more efficiently. Thus, when you save an Audacity Project File (.AUP), Audacity will automatically create a _data folder that has the same name as the AUP file and breaks the longer audio file into smaller chunks that have the .AU extension. Thus, when Audacity opens up the AUP Project File, it loads the individual AU files in the correct sequence automatically. The user should not move or rename and AU files in the _data folder.

Common Uses

  • Audacity audio editing
  • Audio project files

Audio Quality

Part of Audacity projects - quality depends on original source

Transcription Tips for AU

  • Export from Audacity as WAV or MP3 for best results
  • AU files are typically project chunks, not standalone audio

Where AU Files Come From

  • Audacity project folders
10x
Faster than real-time
Get your AU VTT in minutes
99%
Accuracy rate
Industry-leading AI for AU files
53+
Languages
Captions in any language
30+
Export formats
VTT, SRT, text, and more
How It Works

Convert AU 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 AU 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 AU audio.

Step 5

Edit captions

Fine-tune caption timing and text with our editor.

Step 6

Export VTT

Download your AU captions as a WebVTT file.

Common Questions

Everything about AU to VTT

Can you convert AU to VTT captions?

Yes! Sonix transcribes your AU file with precise timestamps and exports it as WebVTT captions for web video.

What is a VTT file?

WebVTT (Web Video Text Tracks) is the native caption format for HTML5 video. It's supported by all modern browsers and video platforms.

VTT vs SRT - which should I use?

Use VTT for web video (HTML5) and SRT for video editors. VTT supports advanced styling like colors and positioning.

Does VTT support styling?

Yes! VTT supports CSS styling for colors, fonts, positioning, and more. Customize how your captions appear on screen.

Is VTT compatible with browsers?

VTT is supported by Chrome, Firefox, Safari, Edge, and all modern browsers. It's the web standard for video captions.

Can I use VTT with video.js?

Absolutely! VTT works seamlessly with video.js, Plyr, JW Player, and other HTML5 video players.

Why Sonix

Web-ready VTT from AU 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 AU files

Other AU conversions

AU to Text

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AU to DOCX

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AU to Subtitles

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AU to Captions

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Other file formats

MTS to text
CAF to text
XSPF to text
WMA to text
AIFF to text
M4A to text
OGA to text
MPGA to text
AIFC to text
MP3 to text
See all supported file formats
Reviews

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Amazing for foreign videos that need subtitles. The platform is super easy to use and gave me EXACTLY what I was looking for.
FN
Fiona N.
East Falmount, MA, USA
I tried 3 other tools online and I can say that sonix blows them out of the water. I was very impressed with the ease of use, the % of words correctly translated and how simple it was to make edits to the translation.
MB
Maria B.
Peoria, AZ USA
It's simply an amazing resource for anyone working with the spoken or written word.
DW
Dennis W.
Daly City, CA, USA
I am very happy with the quality of the transcriptions! Having tried numerous other services, none can compare based on the quality for the value.
RT
Richard T.
Kapaa, HI USA
I’m really dazzled by your system. I have never seen something so accurate. You push the level higher than Otter and available for French language!
MB
Matthieu B.
Courbevoie, France
I'm very happy with the experience. The Spanish translations are superb. I'm in awe!
LV
Luis V.
San Jose, Costa Rica
The best service available for my language (Czech) - thank you very much for saving me a LOT of work!
TF
Tamara F.
Prague, Czech Republic
I absolutely loved how well the software was able to distinguish between individual speakers. Exceptional product and well-polished.
MB
Michael B.
Tampa, FL, USA
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