Curated picks
Tools
Open a card for a full guide and a browser-only tool — no uploads. Details and external picks are below.
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In-browser tools
Utilities that run locally in your browser — use the topic filter above to narrow the list.
Hand-picked from the web
Editorial bookmarks for audits and research — each opens in a new tab at the provider.
- Google Search Console
Coverage, indexing issues, and Core Web Vitals for properties you verify.
SEOExternal - Green Web Foundation
Directory and APIs for green hosting verification.
EcologyExternal - GTmetrix
Performance scores, waterfalls, and historical monitoring for a URL.
PerformanceExternal - Mozilla Observatory
HTTP Observatory scan with a simple letter grade.
SecurityExternal - Pa11y
CLI and dashboard-friendly automated accessibility testing.
AccessibilityExternal - PageSpeed Insights
Lab + field data from Lighthouse for any public URL.
PerformanceExternal - Qualys SSL Labs
Deep TLS configuration and certificate chain analysis.
SecurityExternal - Rich Results Test
Validate structured data Google can use for rich results.
SEOExternal - Schema Markup Validator
Schema.org validation for JSON-LD, Microdata, and RDFa.
SEOExternal
Further down you will find hand-picked third-party tools we use in audits (each opens in a new tab), plus links to our topic hubs and the rest of the site.
For deeper reading, jump into our topic hubs. Everything here opens in a new tab on the provider’s site.
Explore our Performance, Ecology, Accessibility, Security, and SEO hubs for deeper reading.