Convert WEBM to VTT

Create WebVTT caption files from your WebM videos - the perfect pairing for HTML5 web video. WebVTT is the native caption format designed alongside WebM for modern browsers.

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

Understanding WEBM files

What is a WEBM file?

Open web video format for HTML5 and streaming

WEBM is an open, high-quality video standard that is usually used for delivering online videos using the HTML tag. WEBM is a container file format: the video stream is usually compressed with the VP8 codec and the audio stream is compressed with the Ogg Vorbis codec. The WEBM container format itself is based off of the popular Matroska container (MKV files). Since WEBM is an alternative to the patented H.264 and MPEG4 formats and widely supported by most major web browsers, it is used in both commercial and non-commercial applications.
The WEBM file format was created by Google to store video content and implement compression standards optimized for video streaming over broadband and mobile internet connections. Thus, royalty-free video compression technologies were used (VP8/VP9 and Ogg Vorbis). In addition, WebVTT subtitle tracks can we included within a WEBM file. WEBM files are also widely supported by Chrome, Safari, Firefox, and Internet Explorer.

Common Uses

  • YouTube videos
  • HTML5 web video
  • Web streaming
  • Browser-based video

Audio Quality

High-quality open format backed by Google

Transcription Tips for WEBM

  • Very common web format - excellent support
  • VP8/VP9 video with Vorbis/Opus audio
  • Optimized for streaming clarity

Where WEBM Files Come From

  • YouTube downloads
  • Web video platforms
  • Screen recording software
  • OBS Studio exports
10x
Faster than real-time
Get your WEBM VTT in minutes
99%
Accuracy rate
Industry-leading AI for WEBM files
53+
Languages
Captions in any language
30+
Export formats
VTT, SRT, text, and more
How It Works

Convert WEBM 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 WEBM 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 WEBM audio.

Step 5

Edit captions

Fine-tune caption timing and text with our editor.

Step 6

Export VTT

Download your WEBM captions as a WebVTT file.

Common Questions

Everything about WEBM to VTT

Why is VTT ideal for WebM captions?

WebVTT was designed specifically for HTML5 video, just like WebM. Both are open standards that work seamlessly together in modern browsers with native support and CSS styling.

Can I convert YouTube WebM to VTT captions?

Yes! Sonix transcribes your downloaded WebM and exports to WebVTT format, perfect for self-hosted web video or embedding on your own site.

Can I style VTT captions from WebM content?

Yes! WebVTT supports CSS styling for fonts, colors, positioning, backgrounds, and text effects. Create branded captions that match your website design.

How do I add WebM VTT captions to my website?

Add a track element to your HTML5 video element: <track src='captions.vtt' kind='subtitles' srclang='en' label='English'>. Browsers display captions automatically.

Are WebM-to-VTT captions accessible?

Yes! VTT captions meet WCAG accessibility guidelines when properly implemented. Essential for making your web video content accessible to deaf and hard-of-hearing viewers.

Can I create multi-language VTT captions from WebM?

Yes! Transcribe once, then use Sonix's translation feature to create versions in 50+ languages. Link multiple VTT files with different srclang attributes for language selection.

Why Sonix

Web-ready VTT from WEBM 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 WEBM files

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Other file formats

RM to text
MOOV to text
FLV to text
MPE to text
3GP to text
OGV to text
TS to text
QT to text
M4V to text
VOB to text
See all supported file formats
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The transcript came through almost word perfect from a video file. Your system is absolute MAGIC!
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Cheltenham, United Kingdom
It really accelerated my work and I was amazed by the accuracy, especially given that the video featured only non-native speakers.
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McAllen, TX, USA
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Queens, NY, USA
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