Substital

Name: Substital
Rating: 4.2836 (134 reviews)
Author: Gaëtan Covelli

Add subtitles to any video or movie online. Be it on Netflix, Disney+, Youtube or any other online streaming platform.

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Substital is a versatile Chrome extension designed to enhance your video streaming experience by allowing you to add subtitles to virtually any online video or movie. Whether you're watching content on Netflix, Disney+, Amazon Prime Video, YouTube, Vimeo, or other platforms, Substital bridges language gaps for entertainment, language learners, and accessibility for the Deaf or Hard-of-Hearing.

Key features include built-in subtitle search, support for popular video platforms, customizable subtitle appearance, manual synchronization, and drag-and-drop functionality for your own subtitle files in SubRip (.SRT) format. Its user-friendly interface keeps it passive by default, only activating subtitle injection when you choose. Substital is free, ad-free, and constantly updated to ensure compatibility with streaming services, making it an essential tool for anyone seeking enhanced viewing with subtitles.

Add-on Accessibility Productivity Entertainment

By:

Daily users:

Rating:

Version:

2.8.1 Last updated: 2025-05-09

Version code:

5941736

Creation date:

2016-02-10

Risk:

Permissions:

activeTab
storage
scripting

Host permissions:

<all_urls>

Size:

1.53MB

Email:

su*****@substital.com

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Browser Add-ons

Data ingested on:

2025-07-13

Ranking

# 755 ▲ 6

Other rankings

#29 in Language Support ▼ 1

#47 in Games & Entertainment

#120 in Other extensions

#27 in platform keyword 28

#61 in donation keyword 14 ▲ 1

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Other platforms

Substital: Add subtitles to videos and movies (v2.8.1)

300,000 4.34

(2,911)

Substital: Add subtitles to videos and movies (v2.7.0)

16,490 4.50

(36)

User reviews

Users appreciate Substital for effectively adding and customizing subtitles, making it valuable especially for foreign language viewers. It's praised for ease of use and functionality. However, common issues include subtitle synchronization inaccuracies, lack of support in picture-in-picture mode, and occasional progress bar glitches. Users would like features such as displaying multiple subtitles at once and better syncing capabilities.

Pros

Effectively adds subtitles to videos as intended
Allows customization of subtitle size, color, background, and delay
Works well for foreign language learners
Easy to use and setup
Supports adding subtitles to videos without original subtitles

Cons

Subtitle synchronization can be inaccurate or off by several seconds
Does not support displaying subtitles in picture-in-picture mode
Progress bar may not advance properly during playback
Cannot display multiple subtitles simultaneously

Recent reviews

After years using it, I must say it does get the job done.

by Na*****, 2025-06-18

by AY*****, 2025-06-14

extension qui ne sert à rien , à rien du tout , hormis vous enlever les sous titres d'origine , et vous proposer de les remplacer par d'autres que vous n'avez évidemment pas !!!!!!!!!!!

by lo*****, 2025-06-05

View all user reviews ›

Extension safety

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 Browser Add-ons, 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.
Medium **** ********* *** ****** **** ****** ********* ********** *** *** ** ****** ** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******

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