Missing buttons & CTAs
Catches when Buy Now, Start Free Trial, Contact Sales, or other conversion-critical actions disappear or move.
Visual Regression Testing Without Writing Code
NorthDuty is screenshot monitoring and visual regression testing for live websites: it captures screenshots and compares them pixel-by-pixel against previous baselines, so website change detection happens automatically and unexpected design or layout changes surface as a visible diff for review.
Catch layout shifts and missing UI with pixel diffs — no test code to maintain.
Visual regression testing and website change detection, the day a page changes
A release, CMS edit, plugin update, third-party script, or A/B test can change a page in ways no uptime check will catch. A button can move, a form can disappear, a pricing block can break, or a layout can shift enough to hurt the next user action.
Traditional visual regression testing means writing and maintaining Playwright or Cypress snapshot scripts. NorthDuty does screenshot monitoring without code: it captures scheduled screenshots for the project and supports managed URL screenshot sets for broader reviews, then compares later captures pixel-by-pixel against previous screenshots. You see the diff image, the changed percentage, and the page that changed — website change detection that tells you whether the change was expected.
What visual regression monitoring catches
Useful anywhere visible page quality affects leads, sales, signups, or trust.
Layout shifts & broken sections
Detects spacing changes, broken grids, overlapping elements, and structural changes after deploys.
Unexpected content changes
Surfaces pricing edits, hero swaps, navigation changes, and other content that may have been changed unintentionally.
Post-release regression review
After a deploy or CMS push, scan the diffs across every monitored page in one place.
Visual change proof inside NorthDuty
The UI Changes view shows the monitored URL, latest comparison status, changed percentage, previous screenshot, and diff overlay.
UI Changes
Side-by-side screenshot comparison with diff percentage
Use the comparison screen to confirm whether a monitored page changed visually, then open the full-size capture when you need more detail.
Why screenshots and pixel diffs matter
If a page depends on clear visual structure, visual changes are business risk — not just design noise.
- Catch UI breakage that uptime checks cannot see
- Review the diff image instead of guessing what changed
- Cover landing pages, pricing pages, product pages, forms, and checkout screens
- Find regressions after releases, redesigns, plugin updates, and CMS edits
- Support conversion-focused QA without standing up a separate tool
How UI changes monitoring works
It runs automatically on every project, with daily or weekly visual-change cadence available in settings.
1
Add your base URL and managed URLs
Once a project exists, NorthDuty can capture the base URL and any managed URLs discovered or added for broader screenshot sets — no scripts to write.
2
Scheduled screenshots
On each run, the page is stabilized and captured. The capture becomes the new candidate for comparison.
3
Pixel-level diff against the previous baseline
NorthDuty calculates a pixel-level diff between today's capture and the previous one, and reports how much of the page changed.
4
Review and decide
Open the diff image to see exactly what moved or disappeared, then decide whether the change was expected or needs investigation.
Related NorthDuty Pages
Explore pricing, feature details, solution pages, and related tools connected to this website monitoring use case.
Pricing
Pricing
NorthDuty pricing for website monitoring: Free, $29 Starter, $79 Pro, $199 Business, and $499 Enterprise plans.
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Features
Explore NorthDuty features: website health checks every 5 minutes, screenshot-based visual change detection, and AI-suggested user journey monitoring in one project.
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Solutions
Explore NorthDuty solutions for ecommerce website monitoring, SaaS website monitoring, agency website monitoring, and startup website monitoring.
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Website Monitoring
Learn how NorthDuty combines health checks, screenshot diffs, and editable user journeys in one website monitoring project.
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Uptime Monitoring
Monitor uptime every 5 minutes by default with HTTP, SSL, DNS, blank-page detection, broken resources, JavaScript errors, and API call tracking.
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User Journey Monitoring
NorthDuty AI suggests 2-5 website journeys. Enable them in one click or describe a custom multi-step flow in plain text.
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Ecommerce Website Monitoring
Use NorthDuty for ecommerce website monitoring to protect product pages, cart, checkout, payments, and revenue-critical customer journeys.
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Answers to common questions about this monitoring feature and when teams should use it.
What is visual regression testing?
Visual regression testing compares how a page looks now against a previous baseline to catch unintended visual changes. NorthDuty takes screenshots and compares them pixel-by-pixel with previous screenshots, so differences surface as a visible diff image — no test scripts required.
Can I do visual regression testing without writing code?
Yes. Unlike Playwright or Cypress snapshot testing, NorthDuty runs screenshot monitoring automatically on every project. You add a URL and visual change detection runs on a schedule — there is nothing to script or maintain.
How does website change detection work?
On each run NorthDuty captures the page, stabilizes it, and calculates a pixel-level diff against the previous capture. It reports the changed percentage and a diff overlay so you can see exactly what changed and decide whether it was expected.
How often does NorthDuty take screenshots?
Daily by default. The screenshot monitoring cadence is configurable per project.
Can visual regression monitoring catch missing buttons?
Yes. If a button, form, or page section disappears or moves enough to affect the screenshot, the pixel diff surfaces that change for review.
Do I need to set up a baseline?
No. NorthDuty stores successful screenshots and uses the selected or latest completed screenshot set as the baseline for later comparisons.
Call To Action
Start monitoring your website with NorthDuty today.
Get screenshot-based visual regression testing and website change detection for important pages so unexpected design or layout changes are easy to review.
Start on the free plan — add your base URL and monitoring starts in minutes.