Stable signalNo paid features detectedHigh-risk permissions

Substital: Add subtitles to videos and movies

Add captions to any video or movie on Netflix, Youtube or other platforms.

Users300KCurrent public install base

Rating4.3Store average score

Reviews3,175Public review volume

Manifest versionV3Extension platform version

7-day growth0Net users gained this week

7-day growth rate0%Relative weekly velocity

Preview

Substital: Add subtitles to videos and movies Media preview

5 assets

Trend

User growth trend

Review user movement across collected snapshots.

User Growth Over Time

Rating trend

7-day rating trend

View collected rating snapshots from the latest 7-day window to assess rating stability.

7-day rating change

Start

4.33

Latest

4.33

7-day rating change

0.00

2026年7月16日2026年7月22日

Growth overview

Daily, weekly, and monthly growth

Compare 1-day, 7-day, and 30-day net growth and growth rate.

1-day growthNo data

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7-day growthFlat

00%

30-day growthNo data

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Technical snapshot

Version, languages, and crawl freshness

Review publication date, version, supported languages, and crawl timestamps.

Version2.10.3

ManifestV3

Size1.56MiB

Languages3Deutsch / English / français

Published--

Store updated--

Last crawled--

Overview

Product summary

Review the store description, core capabilities, and common use cases.

Be it on Netflix, Disney+, 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:

- 01.09.25 Fix issues with HBO Max, Netflix, and Disney+. Mubi is now officially supported!

- 03.05.25 Fix issues with Amazon Prime Video and Dailymotion.

- 22.12.24 Update to ManifestV3. Fixes issues with Disney+ and ok.ru.

- 21.01.24 Use the new OpenSubtitles API and fix an issue with downloading subtitles

Reviews

Recent review snapshot

Inspect the latest comments and rating distribution.

Store average score4.3Chrome Web Store aggregate rating, including ratings without synced review text

Synced text average4.1Average computed only from synced review bodies below

Reviews with text1,654Synced review bodies

Total ratings / reviews3,175Chrome Web Store public rating/review count

Store average score: 4.3. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.

5★

1034

4★

220

3★

100

2★

1★

230

Tetsu Tou2025年1月30日

結局は外部の字幕をロードして同時に表示させている仕組みで、Netflixの字幕を同時に二つ以上に呼び出す形ではないですが、大変語学勉強に有用です。

Unnat Shaneshwar2025年1月30日

works flawlessly, does exactly whats needed nothing special

Anouar2025年1月29日

Super tool!

Nova Arie Wibowo2025年1月29日

thank you, this really helped me

Michael P2025年1月27日

Work on your synchronization!

TheRealBirb2025年1月27日

Very nice, seamless way to import my own subtitles. I like that it also tells you exactly where there is an error if you have incorrectly formatted subtitles

ZERTIUS Greis2025年1月25日

An error occured Please try again in a short time.

purvak2025年1月24日

Best extension I have ever used. Has so many options for subtitles and so many languages.

Andrea Barrios2025年1月23日

subtitles are not accurate

Anubhaab Chanda2025年1月23日

On point subtitles..Amazing.

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AI product read

Add subtitles/captions to online videos and movies on streaming platforms

Bridges language gaps for entertainment, language learning, and accessibility for deaf and hard-of-hearing users by enabling subtitle overlay on any online video

1. User navigates to a video on a supported streaming platform. 2. User clicks the Substital extension popup. 3. User either searches for subtitles via the built-in search (uses OpenSubtitles) or drags-and-drops a local .SRT file. 4. Subtitles are overlaid on the video player. 5. User can adjust sync timing and customize appearance (size, colors).

Target users: Non-native language speakers watching foreign content / Language learners / Deaf and hard-of-hearing users / Viewers of content without available subtitles in their language

Bundles are heavily minified, making it difficult to trace exact authentication and payment flows
Could not confirm whether the .signin-btn UI is actively rendered or vestigial code
Could not verify if OpenSubtitles API requires authentication for subtitle search

Monetization

No paid features detected

The extension itself has no paid features, subscription plans, or feature gating. The PayPal link found (https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=QDDCUJHJMW66Y) and reference to substital.com/donations are voluntary donations, not paid feature unlocks. The 'pro' and 'premium' keyword hits in minified bundles are from the Plyr video player library and React boilerplate code, not subscription tiers. All described features (subtitle search, drag-drop SRT, sync, customization) appear freely available.

Confidence: 80
Payment platform: PayPal
Source: AI / Medium
Login required: No
Reason: The extension has a signin-btn CSS class in popup/styles.css (lines 404-417), suggesting an optional sign-in UI exists. However, the core workflow—adding subtitles via drag-and-drop .SRT files or searching OpenSubtitles—does not require authentication. The sign-in likely relates to OpenSubtitles API access for searching subtitles, which may be optional or use an API key. No mandatory login flow gates the core subtitle-addition functionality.

Permission risk

High-risk permissions

This estimate uses declared permissions and host permissions to assess access scope and sensitivity.

扩展能力较强：activeTab、storage、scripting、webRequest
主机权限覆盖范围较宽

Publisher

Substital

Independent publisher

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