SubTranslate

Name: SubTranslate
Author: Simon

By: Simon

Click any word in video subtitles to instantly translate it with DeepL. Double-click for full sentences. Supports YouTube, SVT Play, and SVT.

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Install

Features & Capabilities

SubTranslate helps you translate video subtitles instantly while you watch. Click any subtitle word to pause the video and see its translation in a tooltip. Double-click to translate the full sentence. Triple-click to translate all visible subtitles at once.

Features:

Click individual subtitle words for instant translation
Double-click to translate the full sentence
Triple-click to translate all visible subtitles at once
Explore sentence translations with clickable words
Click translated words to see reverse translations back to the source language
Right-click subtitles to copy the text or look up a word on Wiktionary
Correctly handles hyphenated words split across subtitle lines
Automatically pauses playback during translation (configurable)
Tooltip closes when playback resumes
Works on YouTube, SVT Play, and svt.se
Supports all languages available through DeepL

Appearance & customization:

Adjustable subtitle font size and vertical position
Customizable highlight color with presets and HSL color picker
Per-site settings overrides — configure each site independently

Advanced options:

Context history — include previous subtitles for more accurate translations
Choice of DeepL translation model (high quality or fast)

Setup: A DeepL API key is required. Get one from deepl.com/your-account/keys, then open the extension popup and enter your API key and preferred languages.

User Growth & Download Statistics

Add-on

By:

Simon

Daily users:

Version:

1.8.0 Last updated: 2026-04-18

Version code:

6226204

Creation date:

2026-04-06

Risk:

Permissions:

activeTab
storage
https://api-free.deepl.com/*
https://api.deepl.com/*

Content scripts matches:

www.youtube.com
www.svtplay.se
www.svt.se

Size:

47.22KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-15

Compare stats and ranking:

Ranking

# 40,772 ▼ 310

Other rankings

#236 in translate keyword 77 ▼ 6

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Simon

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/subtranslate/

Website:

https://github.com/simonfontana/SubTranslate

Is SubTranslate 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.

SubTranslate requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Request access to the following domains: deepl.com, youtube.com, svtplay.se, svt.se
High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****

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.

SubTranslate is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****