TrackLens: Website Change Tracker

TrackLens keeps a history of any web page and shows you exactly what changed between two versions: the words, the HTML, the SEO tags, the AEO/GEO signals and the look of the page. Everything is stored on your computer, never on a server. Use it to watch a competitor's pricing page, catch an accidental noindex on your own site, see what a client changed on their landing page, or keep a record of terms and docs pages over time. HOW IT WORKS 1. Open any page and click the TrackLens icon. It opens in Chrome's side panel. 2. Click Save snapshot (or press Alt+Shift+L), or Track this page to keep a history. 3. Come back later, pick any two snapshots and compare them. COMPARE ANY TWO VERSIONS • Text diff: side by side or inline, word-level highlights, added and removed counts, jump to the next change • HTML source diff • SEO diff: title, meta description, robots, canonical, Open Graph and Twitter tags, H1 to H6 outline, hreflang, JSON-LD schema, links, image alt text and word count, with summary chips like "Title changed" or "noindex added" • AEO/GEO signals: an answer-engine readiness score on every snapshot, plus a breakdown of questions, answers, schema, author, dates and sources • Visual diff: full-page screenshots with a slider, side by side, overlay and highlighted pixel changes, with the percentage of the page that changed WATCH PAGES AUTOMATICALLY • Re-check tracked pages every 15 minutes, hourly, every 6 hours, daily or weekly • Pages load in a minimized background window, so JavaScript-heavy sites work • A new snapshot is saved only when the content actually changed • Toolbar badge and desktop notification when something changes, plus an optional weekly "what changed" digest • Ignore rules: skip ads, timestamps and cookie banners by CSS selector or with a point-and-click picker, track just one part of a page, or ignore numbers, dates and whitespace KEEP YOUR HISTORY • Timeline for every page with labels, notes and pinned snapshots • Add any page by its address, including a competitor's • Export a shareable HTML comparison report or a PNG of the visual diff • Back up everything to a file and restore it later • Storage meter and cleanup tools in Settings • Light and dark mode, keyboard shortcuts, screen reader labels FREE AND PRO Free: track 3 pages with 20 snapshots each (oldest rotate out), text diff, AEO/GEO score, backup and restore. Pro, a one-time $19.99 with no subscription: unlimited pages and snapshots, SEO diff, visual diff, AEO/GEO breakdown, scheduled checks and alerts, ignore rules and report exports. Buy from the Upgrade page and enter the license key from your email. PRIVACY Your snapshots, screenshots, notes and settings stay in your browser's local storage. TrackLens has no account, no analytics and no tracking, and it never sends page content anywhere. It reads a page only when you save it or when you turn on checks for that site. The only other network request is the Pro license check: the key you enter is verified with our payment provider, Polar.sh. Full policy: https://www.extcafe.com/privacy.html#tracklens Made by ExtCafe, the team behind SEO AI Assistant. Questions: aio@extcafe.com Requires Chrome 116 or newer.