Convert MP4 to VTT

Create WebVTT caption files from your MP4 videos for HTML5 video players. Standards-compliant captions with CSS styling support.

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

Understanding MP4 files

What is a MP4 file?

Universal video standard for web, mobile, and streaming

An MP4 file is also known as a MPEG-4 Part 14 multimedia container. MP4 files were developed by the Moving Picture Experts Group (MPED). WIth an MP4 File, there are separate compression algorithms for the audio and video tracks. Typically, video is compressed with the MPEG-4 codec and the audio is compressed using the AAC codec (which is the same codec used in AAC files). Most MP4 files are downloaded from Apple’s iTunes STore since most of the media downloaded from the store is downloaded in this format. The MP4 format is also used for Internet streaming video.

Common Uses

  • YouTube videos
  • Social media content
  • Video streaming
  • Mobile video playback
  • Video editing

Audio Quality

Industry standard with excellent audio/video quality

Transcription Tips for MP4

  • Most common video format - excellent Sonix support
  • AAC audio track provides great transcription accuracy
  • Works with all resolution from 480p to 4K
  • Screen recordings in MP4 transcribe well

Where MP4 Files Come From

  • YouTube downloads
  • Smartphone cameras
  • Screen recorders
  • Video editors
  • Streaming services
10x
Faster than real-time
Get your MP4 VTT in minutes
99%
Accuracy rate
Industry-leading AI for MP4 files
53+
Languages
Captions in any language
30+
Export formats
VTT, SRT, text, and more
How It Works

Convert MP4 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 MP4 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 MP4 audio.

Step 5

Edit captions

Fine-tune caption timing and text with our editor.

Step 6

Export VTT

Download your MP4 captions as a WebVTT file.

Common Questions

Everything about MP4 to VTT

Can I convert MP4 to VTT captions?

Yes! Sonix transcribes your MP4 video and exports to WebVTT format, perfect for HTML5 video players and web accessibility.

What's the difference between VTT and SRT for MP4?

VTT (WebVTT) supports CSS styling and positioning that SRT lacks. Use VTT for web video with HTML5 players, SRT for broader compatibility with video editors.

Can I style VTT captions from MP4?

Yes! WebVTT supports CSS styling for fonts, colors, positioning, and backgrounds. Match captions to your brand's visual identity.

How do I add MP4 VTT captions to my website?

Add a <track> element to your HTML5 video element pointing to your VTT file. Browsers display captions synchronized with your video automatically.

Are MP4-to-VTT captions accessible?

Yes! VTT captions meet WCAG accessibility guidelines when properly implemented with HTML5 video elements.

Can I create multi-language captions from MP4?

Yes! Transcribe once, then use Sonix's translation feature to create versions in 50+ languages. Export each as a separate VTT file.

Why Sonix

Web-ready VTT from MP4 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 MP4 files

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Other file formats

OGV to text
M4V to text
MXF to text
MPEG to text
MOOV to text
MPG to text
QT to text
WMV to text
TS to text
FLV to text
See all supported file formats
Reviews

Trusted by web developers

4.98 rating from 211 reviews

It is so user friendly! Even for someone like me who is not technologically inclined. And, bonus! It has literally saved me HOURS of time trying to transcribe lengthy practice counseling sessions.
JD
Julie D.
Roanoke, VA USA
Sonix is easy to use. Ridiculously easy. And even though the accuracy wasn't perfect it saved several days in a typical transcription cycle and the hourly cost we usually pay.
KA
Kyle A.
San Francisco, CA USA
It was super easy, affordable, and accurate!
AL
Allison L.
Ellsworth, WI, USA
Amazed by the software even in quite mixed audio!
SG
Simon G.
Derby, United Kingdom
Sonix transcription service has dramatically reduced the time I need to spend on clients' interviews. Tremendous help!
CW
Curt W.
Boise, ID, USA
Sonix is light years ahead of all the other solutions I researched and tried!
GB
Garth B.
Calgary, Canada
Your service is very impressive and I love the UI. And that's an AI expert speaking ;-)
SE
Sebastien E.
Hanoi, Vietnam
Excellent tool if you're looking for an accurate Turkish transcription. I tried a handful of ones, and Sonix won by a landslide.
AK
Ahdi K.
Ankara, Turkey
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Create MP4 VTT captions now

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