iSEO Lens is a Chrome extension that lints the on-page SEO of the page you are viewing. It is built to be fully private: all analysis runs locally in your browser, and the extension does not collect, store, or transmit your data to any server.
What the extension reads
Only to compute SEO results for the page you are actively viewing, and only within your browser:
Page SEO markup — the <title>, meta description and robots tags, canonical link, Open Graph / Twitter tags, headings, image alt text, JSON-LD, and lang / hreflang.
HTTP response headers of the main document — status code, X-Robots-Tag, content type, and security headers (read-only).
Public site files — robots.txt, sitemap.xml, and llms.txt of the site you are visiting.
What it never reads
Anything you type — form fields, search boxes, or passwords.
Cookies, saved logins, or browser storage.
Page content beyond the SEO tags listed above.
Your browsing history, or any tab other than the one you are viewing.
Data handling
No data collection. The extension does not collect or record any personal or usage data.
No transmission. Page content is analyzed on your device and is never sent to iSEO or any third party. The only network requests the extension makes are to fetch the visited site's own public robots.txt / sitemap files, directly from that site.
No third parties. No analytics, advertising, or tracking code is included.
Local settings only. Preferences are stored locally via chrome.storage on your device.
Permissions
Host access is requested at runtime (not at install), solely to read the page you are viewing for SEO analysis; you can revoke it at any time from the panel or chrome://extensions. The extension uses read-only webRequest to read response headers, scripting to read the page's SEO tags, sidePanel to display results, and storage for local preferences.