DuetSub

ExtensionTools

Overview

Personal bilingual subtitle overlay for supported video sites.

DuetSub adds a compact control to supported video players and displays English above Traditional Chinese in a synchronized overlay. When both official tracks are available, DuetSub uses them directly. When one language is missing, users may optionally configure DeepSeek, another OpenAI-compatible HTTPS service, or a local Ollama/LM Studio endpoint to translate the missing line. Simplified Chinese can be converted to Traditional Chinese locally. Supported sites: - Netflix - Prime Video - Max at play.hbomax.com - YouTube DuetSub restores the native subtitle layer when disabled or when it cannot verify subtitle ownership. It does not download video, bypass DRM, unlock region-restricted tracks, inject remote code, or collect analytics.

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Details

Version
0.1.1
Updated
July 28, 2026
Flag concern
Offered by
XWZhang
Size
530KiB
Languages
English (United States)
Developer
Email
xianwei@xwzhang.com
Non-trader
This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

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DuetSub has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.

DuetSub handles the following:

Authentication information

Website content

This developer declares that your data is

Not being sold to third parties, outside of the approved use cases
Not being used or transferred for purposes that are unrelated to the item's core functionality
Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, visit the developer's support site