Step 1
Upload video
Upload your WEBM video file to Sonix and select the language.
Add subtitles to WEBM videos
Sonix automatically transcribes your WEBM video and lets you add professional subtitles with customizable styling.
Free to start — no credit card required.See pricing
Auto-transcribe
Custom styling
Burn-in option
10x
Faster than real-time
Add subtitles to WEBM in minutes
99%
Accuracy rate
Industry-leading AI transcription
53+
Languages
Subtitles in any language
Custom
Styling
Fonts, colors, positioning
Add subtitles to WEBM in 4 steps
Step 2
Auto-transcribe
Sonix AI transcribes your video with word-level timestamps.
Step 3
Customize subtitles
Split subtitles, adjust timing, and customize fonts and colors.
Step 4
Export or burn-in
Download SRT/VTT files or burn subtitles directly into your video.
Everything about adding WEBM subtitles
Can Sonix add subtitles to WEBM videos?
Yes! Upload your WEBM video, and Sonix will transcribe it and let you add professional subtitles with customizable styling.
Can I burn subtitles into the video?
Yes! Sonix can permanently embed (burn-in) subtitles into your WEBM video with your choice of fonts, colors, and positioning.
What subtitle styles are available?
Customize fonts, colors, background boxes, positioning (top, center, bottom), and more for your burned-in subtitles.
Can I download subtitle files separately?
Yes! Export subtitles as SRT, VTT, or other formats to use with YouTube, Vimeo, or your video editor.
Can I translate subtitles to other languages?
Absolutely! Sonix can translate your subtitles into 55+ languages for multilingual videos.
How do I split subtitles correctly?
Sonix offers auto-split options for max characters per line, lines per caption, and max duration. Fine-tune manually if needed.
Why won't my WebM file open in my video editor?
Many desktop editing applications do not include VP8/VP9 decoders, so WebM files may need conversion to MP4 before importing, even though browsers and players like VLC handle them natively.
How do I get subtitles from a WebM video?
Upload the WebM file for transcription, review and edit the resulting transcript, then export it as an SRT or VTT caption file that most video players and platforms accept.
The easiest way to add video subtitles
Auto-Transcribe
Upload your WEBM and get accurate subtitles automatically.
Custom Styling
Choose fonts, colors, and positioning for professional results.
Burn-in Option
Permanently embed subtitles into your video with one click.
Translate
Create subtitles in 54+ languages from your original video.
More ways to work with WEBM files
More ways to convert & transcribe
Jump straight to a related format, language, or tool — every link below is a real page.
Trusted by video creators
Awesome and I was really shocked when I saw how carefully my mp3 file was transcribed!!
I cannot believe how easy, quick, and accurate this is.
Add subtitles to WEBM now
Try Sonix free with 30 minutes of transcription. No credit card required.
