Substital
Add subtitles to online videos with Substital, a browser extension designed for that purpose.
About Substital
Substital is a browser extension for adding subtitles to online videos. It works in the web browser and is intended for videos that do not include subtitles in the language you need.
With Substital you can search for subtitles using the built-in search and select one to display. You can also load your own subtitle file. If the timing does not match the video, you can shift the subtitles with a slider and input field. The extension lists support for more than 90 languages, with handling for special characters in languages such as Greek and Arabic.
Substital suits viewers who watch movies and series on third-party sites, non-native English speakers, and anyone who needs subtitles when a streaming video does not provide them. A Telegram group is available for problem reports, feature suggestions, and updates.
Key features
- Add subtitles to online videos via browser extension
- Built-in search to find and choose subtitles
- Load your own subtitle file
- Adjust subtitle timing with slider and input
- Support for 90+ languages including Greek and Arabic
Best for: People who watch online videos without subtitles in their language, including non-native English speakers.
Good for
- Built-in subtitle search plus own file upload
- Timing adjustment for out-of-sync subtitles
- Language support includes special characters
Substital at a glance
- Website
- substital.com
- Category
- Software & Utilities › Browser Extensions
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Browser extension, Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Substital FAQ
What is Substital?
Substital is a browser extension that adds subtitles to videos online.
How do I add subtitles with Substital?
You can search with the built-in search and choose subtitles, or load your own subtitle file.
Can I fix subtitles that are out of sync?
Yes, you can move subtitles using a slider and input to adjust synchronization.
Which languages does Substital support?
It lists support for 90+ languages, including special characters in Greek and Arabic.
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