Privacy policy

Last updated: October 20, 2026

Tense Lens does not collect, store, sell or share any personal data. There are no accounts, no analytics and no tracking.

Tense Lens for YouTube (Chrome extension)

The extension runs only on youtube.com pages.
To show tenses, it downloads the captions of the video you are watching directly from YouTube, in your browser, the same way the YouTube player does.
The captions are analyzed locally in your browser. They are not sent to the developer or to any other server.
The extension does not read your browsing history, your YouTube account data, or anything outside the video page.
It stores nothing on your device beyond the current page session and uses no cookies of its own.
It does not load or run code from remote servers; all of its code ships inside the extension package.

When you open a video on the website, the video ID is sent to the website’s server function only to fetch that video’s captions. The ID is not logged or stored by the website.
The website remembers analyzed captions in your own browser’s local storage, so a video opens faster next time. You can clear it at any time by clearing site data.
Videos are played through YouTube’s embedded player, which is covered by Google’s privacy policy.
The site is hosted on Vercel, which may keep standard server logs (such as IP address and time of request) for security and operations.

If this policy changes, the new version will be published on this page with a new date.

Questions about privacy: use the support contact on the Tense Lens Chrome Web Store page.