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Update Scanner

Free#52 of 55 in Website Monitoring SoftwareBrowser Automation Tools Website Accessibility Tools

Update Scanner: A focused open-source extension for tracking content changes on selected web pages. Ranked #52 of 55 in Website Monitoring Software by our editors (4.8/10); pricing: Open source; best for tracking changes on selected web pages.

4.8/10Editor score

Visit Update Scanner

Update Scanner4.8 Visit Update Scanner

At a glance

Editor score
4.8 / 10
Pricing
Open source
Best for
Tracking changes on selected web pages
Paid from
Free
Facts checked
21 Sep 2026

Where it wins
- Configurable scan frequency for each monitored page
- Highlights changed text and can ignore minor updates
- Notifications and an updated-pages sidebar keep changes visible
Where it doesn't
- Focused on content changes rather than uptime or technical health
- No SSL, latency, status-page, maintenance-window, or API features
- Distributed as a browser extension rather than a broader monitoring platform

Our verdict on Update Scanner

Update Scanner is an open-source browser extension for monitoring web pages that do not provide Atom or RSS feeds. It is designed for people who need to follow changes on selected pages, such as updated text or newly posted information, without relying on a feed. Users can add pages, choose how often each page is checked, and receive notifications when updates are detected. The extension also highlights changed text and provides a sidebar showing monitored pages with updates.

Its strongest fit is focused content monitoring. Scan frequency can be configured for each page, which gives users control over how often different pages are checked. The option to ignore minor changes helps reduce attention on small edits, while automatic highlighting makes the changed content easier to review. The updated-pages sidebar adds a central view of which monitored pages need attention. These features make Update Scanner suitable for lightweight tracking across a selected set of pages, especially when those pages lack Atom or RSS feeds.

The product is deliberately narrower than a full website monitoring service. Its published capabilities cover page health checks and content-change detection, but not SSL monitoring, latency monitoring, status pages, maintenance windows, or API access. That makes it a practical choice for readers, researchers, and individuals who want browser-based change alerts, while teams needing operational monitoring should choose a product with broader technical checks and service-management features. Choose Update Scanner when page content is the main concern; look elsewhere when uptime, infrastructure signals, integrations, or programmatic access are central requirements.

Your product? Our editors can test Update Scanner in depth and publish a review, labelled as paid · from $149/mo →

Update Scanner pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.

See plans on sneakypete81.github.io

Update Scanner fact sheet

Free plan	Not verified
Paid from	Free
Check types	Not verified
SSL monitoring	No
Latency monitoring	No
Page health checks	Yes
Status page	No
Maintenance windows	No
API access	No
Deployment	Browser extension
Platforms	Chrome extension
Support	Community
Built for	Solo, Small business (editorial estimate)
Pricing	Open source
Website	sneakypete81.github.io
Facts checked	21 Sep 2026

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Also Ranked In

Update Scanner is ranked in 3 of our directories.

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Featured on iTechGuides

Update Scanner is listed in our Website Monitoring Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated 7 Oct 2026 · How we research and update