Privacy

Last updated: August 24, 2026

OpenTechCheck is built so that this policy can stay short. The extension analyzes web pages locally in your browser and has no server to send anything to.

The browser extension

• All technology detection runs inside your browser, on your device.
• The extension makes no network requests. Fingerprints, icons, and fonts ship inside the extension package.
• No browsing history, page content, URL, or detection result ever leaves your browser.
• There is no account, no sign-in, no telemetry, no analytics, and no advertising.
• Detection results are kept in temporary browser session storage per tab and are discarded when the tab closes.
• The "Export JSON" and "Copy stack" actions write only to your clipboard or your downloads folder, at your request.

Why the extension requests broad permissions

• host access on all sites — technology detection has to read the page you are viewing. It reads; it never transmits.
• webRequest — response headers (for example server: nginx) are detection signals. Headers are inspected locally and stored only in per-tab session storage.
• cookies — cookie names (for example laravel_session) identify technologies. Cookie values are matched locally and never transmitted.
• storage — holds per-tab detection results until the tab closes.

This website

• opentechcheck.com is a static site. It sets no cookies and runs no analytics or tracking scripts.
• The site is served by Cloudflare, whose infrastructure processes standard request logs (IP address, user agent) to deliver the site. See Cloudflare's privacy policy.

Changes and contact

If this policy changes, the change lands as a public commit in the open-source repository before it appears here. Questions or concerns: open an issue.