Substital
By: Gaëtan Covelli
Add subtitles to any video or movie online. Be it on Netflix, Disney+, Youtube or any other online streaming platform.
English
Español
Français
Português
日本語
简体中文
한국인
Features & Capabilities
User Growth & Download Statistics
- By:
- Gaëtan Covelli
- Daily users:
- 12,276 63
- Rating:
- 4.27 (143)
- Version:
- 2.10.6 Last updated: 2026-04-24
- Version code:
- 6227378
- Creation date:
- 2016-02-10
- Risk:
- Moderate risk impact Moderate risk likelihood
- Permissions:
- Host permissions:
- <all_urls>
- <all_urls>
- Size:
- 1.53MB
- Email:
- su*****@substital.com
- URLs:
- Website ,Privacy policy
- Full description:
- See detailed description
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-06-17
- Compare stats and ranking:
-
Contact the developer
Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Permission Change History
2024-12-22: Version 2.7.0 → 2.8.0
Add Host permissions: <all_urls>
Add Permissions: scripting
Remove Permissions: <all_urls>
User Reviews
Most reviews say Substital works well, is easy to use, and helps with language learning by letting users add and customize subtitles. Users appreciate customization options like size, color, background, and delay, and the ability to search for subtitles. Some report reliability issues after updates, and a few note potential caveats like removing original subtitles or desire for extra features such as two subtitles at once, precise start timestamps, or Picture-in-Picture subtitle support. Pros
- It works and gets the job done across different videos and languages
- Very easy to use
- Helpful for language learners
- Offers subtitle customization options (size, colors, background, delay)
- Allows adding subtitles to videos that otherwise lack subtitles or need dubbing
Cons
Recent reviews
by Fi*****, 2026-05-20
Works pretty well for any streaming websites. I just wish it can search the subtitles itself based on pre-configured preferences.
by Fi*****, 2026-04-17
зачетно, спасибки
by zr*****, 2026-03-12
Is Substital Safe?
Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.
Substital requires a few sensitive permissions. Exercise caution before installing.
Risk impact analysis details
- Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.
Substital is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.
Risk likelihood analysis details
- Medium This extension was updated in the past 3 months. New updates may not be stable or safe.
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- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
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