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Technical website diagnostics
Check Your Website for Technical and SEO Issues
Check a page or website for metadata, robots.txt, sitemap.xml, redirects, HTTPS, performance and other technical SEO signals. WebDiag surfaces issues, affected URLs and helps you decide what to fix first.
Run a quick URL check without complex setup. Below you can see a detailed report example with priorities and recommendations.
140+ tools for SEO and diagnostics
Clear reports with priorities
Save time for site owners and SEO specialistsCheck websites on any CMS or technology stack
WordPress
OpenCart
1C-Bitrix
Tilda
Joomla
MODXPopular tools
Focused checks for common technical and SEO tasks.
SEO check
Technical check of a single page with a score and issue list.
Performance analysis
Core Web Vitals, Lighthouse signals and performance bottlenecks.
Robots.txt check
Check file availability, crawl rules and Sitemap directives.
Sitemap.xml check
Validate XML, sitemap availability and target URL presence.
Redirect check
HTTP status, final destination and the complete redirect chain.
Meta tags check
Title, description, robots, canonical, Open Graph and JSON-LD.
HTTPS check
SSL certificate, HTTPS and core secure-connection parameters.
Image SEO check
Alt text, dimensions, lazy loading, responsive markup and social preview images.
How the check works
3 simple steps — from URL to a ready report
WebDiag checks it
The service analyzes technical and SEO signals and groups detected issues.
Get the result
Review priorities, affected URLs and recommended fixes.
What WebDiag checks
A complete technical and SEO website audit
Robots.txt
File availability, Allow/Disallow rules and their effect on crawling.
Sitemap.xml
Sitemap structure, availability, URLs and XML errors.
Redirects and statuses
3xx/4xx/5xx, redirect chains, broken and unreachable pages.
Metadata and structure
Title, description, H1–H6, robots, Open Graph and core on-page signals.
Page performance
Core Web Vitals, Lighthouse, heavy resources and slow templates.
HTTPS and security
SSL, mixed content and baseline HTTP security headers.
Internal links
Broken links, destinations, depth and internal page relationships.
Canonicalization
Canonical, noindex and conflicting indexing signals.
Accessibility
Alt text, labels, contrast, ARIA and keyboard navigation.
Content and duplicates
Duplicate metadata, thin pages and competing signals.
Indexing
Robots, noindex, canonicals and crawler accessibility.
Images
Broken files, alt text, dimensions, lazy loading and responsive markup.
Report example
Clear priorities, affected pages and recommendations
Issues 36PagesParametersComparison
Meta description is missing12Critical
Broken links4High
Oversized images23Medium
robots.txt needs attention1Medium
Canonical is missing8Medium
Meta description is missing12 pages (4.8% of pages)
View full report exampleRecommendation
Add unique meta descriptions to all important pages.
Change monitoring
Track website health over time
142Pages checked
36Issues found
28Resolved
Knowledge base and useful resources
Guides and articles for webmasters
SEO
Technical SEO fundamentals
What to check first and how to separate critical issues from improvements.
Guide
How to check robots.txt
Check crawler access and find the rule that blocks a target URL.
Analytics
Core Web Vitals without metric overload
How to read LCP, CLS and related signals and where to start optimizing a page.
Frequently asked questions
Short answers to common questions
You can run a quick check of a public URL from the homepage. An account is used for projects, saved history and monitoring.
Technical and SEO signals including metadata, robots.txt, sitemap.xml, statuses and redirects, canonicals, indexability, links, images, performance, HTTPS and other checks available in the product.
A quick check analyzes one URL. In the account workspace you can work with a project, bounded site crawl, reports and repeated checks.
Yes. For project-audit issues the interface shows specific pages and priority so the fix can be handed off directly.
Yes. Focused tools can verify an individual signal, while the account workspace supports repeat runs and project history.
Check your website now
Enter a URL and run a technical page check. For ongoing control, add the website to your account and enable monitoring.