# Substital

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

Canonical page: [https://chrome-stats.com/d/substital](https://chrome-stats.com/d/substital)

## Overview

- **ID:** `substital`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Gaëtan Covelli
- **Category:** language-support,photos-music-videos,games-entertainment
- **Daily users:** 12,821
- **Weekly downloads:** 521
- **Rating:** 4.27 / 5 (148 ratings)
- **Version:** 2.10.6
- **Last updated:** 2026-04-24
- **First published:** 2016-02-10
- **Size:** 1.53 MB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/substital/)
- **Website:** [https://substital.com/faq](https://substital.com/faq)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/substital/privacy/](https://addons.mozilla.org/firefox/addon/substital/privacy/)

## Description

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.

## Rankings

- #670 — Overall
- #26 — Language Support
- #52 — Games & Entertainment
- #109 — Photos, Music & Videos
- #39 — platform
- #48 — appreciate

## Permissions and access

### Permissions

- `activeTab`
- `storage`
- `scripting`

### Host permissions

- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has medium user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

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

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Source: [Chrome-Stats](https://chrome-stats.com/d/substital)