SEO tool category

Technical SEO and Developer Tools

Inspect HTML, response headers, resource references, viewports, mixed content, and common technologies. Static checks do not measure real browser performance unless the tool explicitly says they do.

Popular picks

Robots.txt Generator

Build a robots.txt file with AI crawler presets and custom rules.

Browser tool Open tool

Hreflang Generator

Build hreflang tags for multilingual and international websites.

Browser tool Open tool

.htaccess Redirect Generator

Generate Apache .htaccess 301 redirect rules from a URL mapping.

Browser tool Open tool

Technology Stack Checker

Detect web server, CDN, analytics, JavaScript frameworks, and hosting provider.

Server check Open tool

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All Technical SEO and Developer Tools

Check page resources, security signals, mobile viewport, favicon, CMS, and other technical details.

FAQ

Questions about Technical SEO and Developer Tools

Are these tools for developers only?

No. They are useful for SEOs, site owners, and developers, but some outputs such as .htaccess, nginx, headers, or hreflang should be reviewed before deployment.

What technical issue should I check first?

Start with page availability and indexability, then inspect crawl files, redirects, mobile viewport, headers, and implementation-specific signals.

How these tools handle checks, data, and limitations

Most tools run in your browser or fetch public URLs only. They do not use private Google Analytics, Search Console, or account data.

Use results as practical diagnostics, then validate critical fixes with official platform tools, crawlers, and production checks before deployment.

Reviewed Jun 2026 · Sources and limitations

Review details: 2026-06-10 · Marc LaClear · v1.0

Reference sources:

Known limits:

  • Checks are based on publicly fetchable HTML, response headers, and browser-side input. They do not use private Google Search Console, analytics, or ranking data.
  • Scores and warnings are diagnostic aids, not guarantees of ranking improvement or Google indexation.
  • Pages blocked by robots.txt, login walls, bot protection, heavy JavaScript, or network timeouts may return incomplete results.
  • Validate critical fixes with official Google tools such as Search Console, Rich Results Test, Lighthouse, and your own crawl data.

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