Text diff
Inline or side-by-side, with word-level highlights, added and removed counts and jump to the next change. Free.
TrackLens by ExtCafe · Coming soon
Website Change Tracker Chrome Extension
TrackLens saves versions of any web page you choose and shows exactly what changed: the words, the HTML, the SEO tags, the AEO/GEO signals and the look of the page. Everything stays on your computer.
Coming soon to the Chrome Web Store. Free plan included, Pro is a one-time $19.99.
Overview
What is TrackLens?
TrackLens is a Chrome extension by ExtCafe that keeps a history of any web page and compares versions. Save a snapshot from the side panel or with Alt+Shift+L, then compare any two snapshots as a text diff, HTML source diff, SEO diff or visual diff. It is built for marketers, SEO teams and founders who watch their own pages and their competitors'.
- Local onlySnapshots stay in your browser, no account, no analytics
- 5 diffsText, HTML, SEO, AEO/GEO and visual
- Auto-checksFrom every 15 minutes to weekly, with alerts (Pro)
- $19.99 onceLifetime Pro, no subscription
Features
What can TrackLens compare?
TrackLens compares the words, the source, the search signals and the look of a page between any two snapshots.
SEO diff
Title, meta description, robots, canonical, Open Graph, Twitter tags, H1 to H6, hreflang, JSON-LD schema, links, image alt text and word count. Pro.
AEO/GEO signals
An answer-engine readiness score on every snapshot, free. Pro adds the breakdown of questions, answers, schema, author, dates and sources.
Visual diff
Full-page screenshots side by side, with a slider, an overlay and highlighted pixel changes. Pro.
Scheduled checks
Re-check tracked pages on a schedule and get a badge and desktop notification only when something changed. Pro.
Ignore rules
Skip ads, timestamps and cookie banners, or track one part of a page with a point-and-click element picker. Pro.
How it works
How do I track changes to a web page?
Open the page, save a snapshot, and come back later to compare. TrackLens keeps the history for you.
Open the side panel
Click the TrackLens icon on any page to open it in Chrome's side panel.
Save or track the page
Click Save snapshot, press Alt+Shift+L, or choose Track this page. You can also add a competitor's page by its address.
Compare versions
Open the dashboard, pick any two snapshots and see what changed in the text, HTML, SEO tags and screenshots.
Pricing
How much does TrackLens cost?
TrackLens has a free plan. Pro is a single $19.99 payment through Polar.sh with lifetime updates and no subscription. You get a license key by email and enter it in TrackLens to unlock Pro.
| Feature | Free | Pro, $19.99 once |
|---|---|---|
| Tracked pages | 3 | Unlimited |
| Snapshots per page | 20 (oldest rotate out) | Unlimited |
| Text diff and AEO/GEO score | Yes | Yes |
| SEO, visual and AEO/GEO breakdown diffs | No | Yes |
| Scheduled checks and alerts | No | Yes |
| Ignore rules and HTML report export | No | Yes |
| Backup and restore | Yes | Yes |
Privacy
What does TrackLens do with my data?
Nothing leaves your computer. Snapshots, screenshots, notes and settings are stored in your browser's local extension storage, and TrackLens has no analytics or tracking. Read the full privacy policy.
Site access on request
TrackLens reads a page only when you save it, or when you turn on checks for it and allow that one site. Pro license keys are checked with Polar.sh, without any page data.
You stay in control
Delete any snapshot or everything at once, export a backup file, and uninstalling removes all stored data.
FAQ
TrackLens frequently asked questions
What is TrackLens?
TrackLens is a Chrome extension by ExtCafe that saves versions of any web page you choose and shows exactly what changed between them: the text, the HTML source, the SEO tags, the AEO/GEO signals and, with Pro, a visual screenshot comparison.
Where is my data stored?
Everything stays on your computer, in your browser's local extension storage. TrackLens does not send page content, screenshots, URLs or browsing activity to any server, and it has no analytics or tracking.
Can TrackLens check pages automatically?
Yes, with Pro. You can schedule a check every 15 minutes, hourly, every 6 hours, daily or weekly. TrackLens loads the page in a minimized background window, saves a new snapshot only when the content changed, and shows a badge and a desktop notification.
Can I track a competitor's page?
Yes. Add any public page by its address, such as a competitor's pricing or landing page, and TrackLens keeps a history of how it changes over time.
What is free and what is in Pro?
Free lets you track 3 pages with 20 snapshots each, with text diff, the AEO/GEO score and backup and restore. Pro is a one-time $19.99 purchase that adds unlimited pages and snapshots, SEO diff, visual diff, the AEO/GEO signal breakdown, automatic checks with alerts, ignore rules and HTML report exports.
Can I ignore ads, dates and cookie banners?
Yes, with Pro. Ignore rules let you skip parts of a page by CSS selector or with a point-and-click element picker, track only one part of a page, and ignore whitespace, numbers or dates so noise does not count as a change.
Which browsers does TrackLens support?
TrackLens is built for desktop Chrome version 116 or later and Chromium-based browsers such as Edge and Brave. It does not run on mobile browsers.
When can I install TrackLens?
TrackLens is in final testing and coming soon to the Chrome Web Store. Email aio@extcafe.com to hear when it launches.
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TrackLens is coming soon to the Chrome Web Store. Email us and we will tell you when it launches.