Privacy Policy — YouTube Dual Subtitles

Last updated: 2026-06-07

YouTube Dual Subtitles ("the extension") is a browser extension that shows bilingual subtitles on YouTube, can OCR-translate on-screen text when the video is paused, and lets you save subtitle words to a personal vocabulary list. This policy explains exactly what data the extension handles.

Summary

We do not collect, sell, or transmit any personally identifiable information. We operate no servers and run no analytics, tracking, advertising, or remote logging. Your settings and saved words stay in your own browser.

Data Stored Locally

• Settings (target language, subtitle mode, theme colors, font size, overlay position/size) — stored via chrome.storage in your browser.
• Vocabulary list (subtitle words you choose to save) — stored locally in your browser.
• OCR model cache — downloaded language-model files are cached locally so they download only once.

This data never leaves your device and is never sent to us. You can delete it at any time by clearing the vocabulary list in the options page or removing the extension.

Network Requests

The extension makes outbound requests only to provide its features, and only sends the minimum data needed:

• Google Translate (translate.googleapis.com) — subtitle text and OCR-recognized text are sent to obtain a translation. No account, identity, or tracking data is attached. This text is governed by Google's privacy policy.
• OCR model files (tessdata.projectnaptha.com) — static, open-source Tesseract .traineddata model files are downloaded the first time you use the pause-to-OCR feature. No user data is sent to this host.
• YouTube (www.youtube.com) — the extension reads the caption track of the video you are watching to render dual subtitles. No data is sent to us.

What We Do Not Do

• We do not collect or store personal data on any server (we have none).
• We do not use cookies, analytics, advertising, or fingerprinting.
• We do not sell or transfer your data to third parties.
• We do not use your data for creditworthiness or lending purposes.
• We do not use your data for any purpose unrelated to the extension's single purpose.

Remote Code

All executable code, including the WebAssembly OCR engine, is bundled inside the extension package and runs from the extension's own origin. The extension does not download or execute any remote code.

Children's Privacy

The extension is a general-purpose tool, collects no personal data, and is not directed at children.

Changes

If this policy changes, the updated version will be posted at this URL with a new "Last updated" date.

Contact

Questions about this policy can be sent to: hxwpsnl@gmail.com