- Canonical removed/blog/seo-guide · 12 min agoCritical
- Title changed/pricing · 38 min agoReview
- Noindex added3 pages · 1 hour agoCritical
Technical SEO monitoring & change alerts
Technical SEO monitoring for changes that matter
Track changes to your pages, robots.txt and sitemaps. See exactly what changed and get alerts in Slack or Telegram.
Explore the workspaceNo registration
- No credit card
- 7-day monitoring trial
- Desktop and mobile evidence
Product previewSee a real SEO change diff Open preview
Scheduled monitoring
Anonymous sample audit
SEO change overview
- robots.txt modifiedNew disallow rule detectedReview
- sitemap.xml shrank214 URLs removedCritical
- HTTP status stable127 monitored pagesGood
H1 overwritten by a filter
Mobile profile · /category/ensembles
Was Jazz ensembles for bands & orchestras
Now 142 items found
Technical SEO change detection
Know what changed before search traffic reacts
Save a baseline and recheck your key pages on a schedule to catch unexpected changes between audits.
A release or CMS edit can remove a canonical, add noindex, or block a section in
robots.txt while the page still looks normal to visitors.
Before setting up monitoring, run a free SEO page audit, crawl up to 500 URLs, or validate robots.txt rules.
Choose the evidence you need
Start with one URL, investigate site-wide patterns, or preserve a baseline for recurring change review.
SEO page audit
Inspect a public URL for metadata, headings, canonical tags, robots directives, links, schema, images, rendered HTML and security headers.
- Best for pre-publish checks
- No account required
Technical website crawler
Follow internal links and review site-wide patterns: response codes, duplicate or missing tags, crawl depth, outgoing links and content signals.
- Best for issue discovery
- Mobile or desktop user agent
Continuous SEO monitoring
Compare snapshots of business-critical pages, robots.txt and sitemaps, keep a change history, and route important alerts to Slack or Telegram.
- Best for preventing regressions
- 7-day trial of monitoring essentials
Turn observed evidence into the next action
Check
Run an instant page audit, a full crawl, or a focused technical validator.
Understand
See the exact title, canonical, directive, or sitemap entry that changed.
Monitor
Recheck selected pages and crawl controls on a schedule, then review meaningful differences.
Turn silent website changes into a visible workflow
2-UA gives SEO, agency and engineering teams the same evidence: what changed, where it changed, and when it first appeared.
For in-house SEO teams
Protect category pages, templates and high-value landing pages between scheduled audits. Review indexability, metadata and sitemap changes before diagnosing a traffic drop days later.
Plan useful alertsFor SEO agencies
Keep client sites under consistent technical control, separate urgent regressions from routine edits, and use snapshot history to explain what happened without relying on memory or screenshots.
Explore agency reportingFor developers and product teams
Add a fast post-release safety net for canonical tags, headings, response codes, robots rules and rendered output. Share the actual before-and-after diff instead of a vague SEO bug report.
Run a release check
SEO Release Guard
Protect the next release with a before-and-after check
Connect a supported publishing workflow, select representative pages, save a baseline, and run the same checks after a release.
Release Guard keeps the observed old and new values together with the run, URL, and device profile. Your team can decide whether a canonical, robots directive, heading, status, or sitemap change is expected before accepting the new baseline.
Start with monitoring essentials, then choose the scale you need
After 7 days, monitoring pauses until you choose a paid plan.
7 days free · No credit cardMonitoring from €19/mo Compare plans
Start with the question you need to answer
Run a focused check without creating a project, then save the evidence only when continued monitoring is useful.
Questions teams ask before putting a site under watch
Need to test the output first? The page audit, crawler, robots.txt tester and other focused tools are available without registration.
Explore free SEO toolsWhat is technical SEO monitoring?
It checks crawlability and indexability signals on a schedule and compares them with a saved baseline to reveal changes between audits.
What page changes can 2-UA detect?
2-UA can track page titles, meta descriptions, headings, canonical URLs, meta robots, response codes, redirects, response headers and selected HTML content. Mobile and desktop profiles help reveal output that changes by user agent or rendering path.
Can I monitor robots.txt and sitemap.xml?
Yes. Monitoring can surface changed robots.txt directives and sitemap differences, including meaningful changes in the number of listed URLs. The free robots.txt validator is useful for checking syntax and allow or disallow behavior before you start recurring monitoring.
How is continuous monitoring different from a website crawl?
A crawl finds technical problems across linked URLs at a point in time. Monitoring rechecks selected pages and files over time. Use a crawl to choose what to monitor.
Where are change alerts delivered?
Alerts go to Slack or Telegram with the affected URL and old and new values, so your team can decide whether a change is expected.
Will monitoring improve Google rankings by itself?
No tool can guarantee rankings. 2-UA helps teams find technical regressions and unexpected changes sooner; your team still decides what to fix and how it fits the wider SEO strategy. It complements Search Console and analytics by showing the page-level change that may explain a new crawl, indexation or traffic problem.
Practical technical SEO guides
Browse all articles
Go deeper than the report
Execution-ready workflows for crawling, monitoring, alerting and explaining technical changes.
Crawling · 23 min
Soft 404s: how a successful HTTP response can erase a page from search
Distinguish true 404s, soft 404s, valid empty states, redirects, and transient failures, then enforce correct HTTP semantics across server-rendered and single-page applications.
Read guide Crawling · 25 minJavaScript SEO in 2026: rendering queues, hydration, byte limits, and content parity
Decide what must be server-rendered, test source and rendered parity, and diagnose failures caused by the 2 MB fetch boundary, hydration, state, resources, and status handling.
Read guide Monitoring · 26 minSEO experiments without fooling yourself: a causal framework for template and content changes
Choose randomized page cohorts, matched controls, or interrupted time series; freeze stop rules; and reject results when noise cannot be separated from the change.
Read guide Crawling · 25 minInternal links as a ranking system: from PageRank theory to a testable site architecture
Find structurally important but weakly connected pages, choose links that improve navigation and discovery, and test the change without inventing link-juice precision.
Read guide Crawling · 24 minServer logs vs Search Console: which evidence answers which crawling question?
Choose the right evidence for HTTP requests, rendering, indexed URL state, and search performance, then join the sources without forcing unlike totals to match.
Read guide Crawling · 25 minThe canonical paradox: why Google can ignore your canonical and how to diagnose the conflict
Reconstruct the duplicate cluster, expose conflicting redirects, canonicals, sitemaps, links, and content, then choose the URL control that fits the resource.
Read guideFree Chrome extensions for technical SEO
Run focused checks directly on the page you are reviewing.
Technical SEO without blind spots