Substital
Add subtitles to any video or movie online. Be it on Netflix, Disney+, Youtube or any other online streaming platform.
Substital: Add Subtitles to Online Streaming Videos
Substital is a user-friendly Firefox add-on designed to facilitate adding subtitles to various video streaming platforms. Be it Netflix, Disney+, Amazon Prime, Vimeo, Youtube, or other websites, Substital aims to bridge the language gap for entertainment, language learning, or accessibility purposes. It allows users to search for, add, and manually sync subtitles for a better viewing experience. It is completely free, without ads, and requires activation by the user when adding subtitles to a video.
Add-on stats
Weekly download count: 472
Firefox on Android: Yes
Risk impact: Moderate risk impact 
Risk likelihood:
Manifest version: 3
Permissions:
- activeTab
- storage
- scripting
Host permissions:
- <all_urls>
Size: 1.61M
Email: su*****@substital.com
URLs: Website ,Privacy policy
Ranking
# 791 ▲ 1
Other platforms
Not available on Android
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Add-on summary
Be it on Netflix, Disney+, Amazon Prime, Vimeo, Youtube or any other online streaming website - Our mission is to fill any language gap that exists whether for entertainment, language learning or to make videos accessible to the Deaf and Hard-of-Hearing.
RECENT UPDATES:
- Added support for Disney+
- Fixed the bug with Netflix new video player. Runs again on Netflix!
FEATURES:
- Supports Netflix, Disney+, Amazon Prime Video, YouTube, Dailymotion, Vimeo and many other video platforms.
- Search for subtitles with the built-in-search feature.
- Add your own subtitles with drag and drop (supported format: SubRip (.SRT) or ZIP archive containing a .SRT).
- Manually synchronize the subtitles, if they are out of sync.
- Change the subtitles font size, text colour and background color.
- Supports special characters for languages like Greek or Arabic.
- Substital is passive by default and won't inject anything in the pages you visit. Only YOU decide when to add subtitles to a video.
User reviews
These summaries are automatically generated weekly using AI based on recent user reviews.
Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate,
spammy, or outdated. Pros
- Extremely useful for adding subtitles to videos
- Works well across different video services
- Easy to use and setup
- Great customization options for subtitles
- Helps to bridge language barriers for diverse viewing experiences
Cons
- Subtitle synchronization issues
- Recent changes requiring VIP membership for opensubtitles
- Some users experienced the progress bar not advancing during playback
- Search for subtitles feature no longer functions well
Most mentioned
- Subtitle synchronization issues
- VIP membership requirement hindering subtitle access
- Overall ease of use and utility in watching foreign language content
User reviews
Unbelievable easy to work with this addon. I finally can add subtitles into my dub german videos!
Thank you!
by Kroko, 2025-01-05
Working great on everything
by Firefox user 18586187, 2024-12-30
by fiti25, 2024-12-16
Add-on safety
Risk impact
Substital requires a few sensitive permissions. Exercise caution before installing.
Risk likelihood
Substital is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.
Upgrade to see risk analysis details