Google PageSpeed Insights
Google's official Lighthouse report: Performance, SEO, Accessibility, Best Practices.
Open PageSpeed Insights ↗Auto fillOn submit we call the official Google PageSpeed Insights API and show your site’s Core Web Vitals from real Chrome users (LCP / INP / CLS), plus the mobile / desktop lab performance score — the same numbers you’d see at pagespeed.web.dev. We also pre-fill 30+ free third-party tools so you can go deeper. Everything runs across 30+ free tools to help you dig into your site.
Calling Google PageSpeed Insights — usually 20–40 seconds…
This is Google’s live performance data for your URL (Performance score + LCP / CLS / TBT / FCP), identical to pagespeed.web.dev since it calls the same API. SEO / accessibility scores were removed — those are 10 binary checks with limited value; see Real inspection above and AI deep analysis below for the real issues.
These run in your browser — no external tool required.
All tools are official free versions from the listed organizations. Tools that accept a URL via query parameter are tagged "Auto fill"; those that don't are tagged "Manual paste".
Audit titles, descriptions, Core Web Vitals, structured data, mobile-friendliness, HTML validity and indexability.
Google's official Lighthouse report: Performance, SEO, Accessibility, Best Practices.
Open PageSpeed Insights ↗Auto fillCheck whether the page exposes Google-supported structured data (FAQ, Product, How-to…).
Open Rich Results Test ↗Auto fillCo-maintained by Schema.org and Google — validates JSON-LD / Microdata / RDFa.
Open Schema Validator ↗Auto fillConfirms HTML semantics are valid — indirectly affects crawl quality and accessibility.
Open W3C Validator ↗Auto fillInspect how many pages Google has indexed for your domain — spot mirrors or anomalies.
View Google indexing ↗Auto fillMicrosoft's official SEO console: crawl diagnostics, query performance, backlinks, IndexNow.
Open Bing Webmaster ↗Login requiredOpen your domain's robots.txt — confirm you're not blocking crawlers by mistake.
Open robots.txt ↗Auto fillOpen your sitemap.xml — verify it's reachable and well-formed.
Open sitemap.xml ↗Auto fillCheck whether AI search engines (Perplexity, Bing Copilot, Google AI Overviews) actually cite your site.
Search Perplexity to see whether your domain is cited as a source.
Search on Perplexity ↗Auto fillCheck if Bing Copilot cites your site when answering questions.
Ask Copilot ↗Auto fillSearch "what is" or "how to" plus your brand on Google to see whether an AI Overview generates.
Trigger AI Overview ↗Auto fillJSON-LD completeness is the core of GEO. Reuses the Schema.org Validator above.
Open Schema Validator ↗Auto fillSchema.org's official JSON-LD editor/visualizer for debugging structured data.
Open JSON-LD Playground ↗Manual pasteAI engines weigh E-E-A-T "Trust" signals — see whether your brand has public reviews.
Search on Trustpilot ↗Auto fillMapped to WCAG 2.1 AA: contrast, alt text, keyboard reach, ARIA, form usability.
WebAIM's authoritative free ADA scanner — lists every violation element-by-element.
Open WAVE ↗Auto fillWCAG color-contrast calculator — paste foreground/background and get AA/AAA verdict.
Open Contrast Checker ↗Manual pasteThe Accessibility section of the PageSpeed report — overlaps heavily with WCAG checks.
View Lighthouse A11y ↗Auto fillChrome / Firefox extension — the industry-standard automated accessibility engine.
Install axe DevTools ↗Browser extensionFree browser extension from TPGi (Vispero) — focused on WCAG 2.1 / 2.2.
Learn about ARC Toolkit ↗Browser extensionMobile layout, cross-device rendering, type legibility, and the visual side of Core Web Vitals.
Lighthouse mobile emulator — includes CLS, INP, LCP visual-stability metrics.
View PageSpeed Mobile ↗Auto fillFree online tool that emulates phones / tablets / desktops at many sizes.
Open Responsive Checker ↗Manual pastePress F12 on any page and toggle the device toolbar to emulate common screen sizes.
View documentation ↗Built-inValidates CSS syntax to prevent rendering quirks that break the UI.
Open CSS Validator ↗Auto fillBrowse historical snapshots of your page to compare visual before/after.
Open Wayback ↗Auto fillAudit GBP info, branded search, map indexing and local pack results.
Google's official business-info console (formerly Google My Business).
Open GBP dashboard ↗Login requiredLook up your brand on Google Maps — confirm the profile exists and is claimed.
Search on Maps ↗Auto fillSearch your domain directly to inspect the Google knowledge panel and business card.
Brand search on Google ↗Auto fillFree local-SERP checker — supports specifying city and keyword for a simulated search.
Open BrightLocal ↗Manual inputDiscover where your business is listed (Yelp, Yellow Pages, etc.) to fix NAP consistency.
Open Whitespark ↗Manual inputSearch engines, review platforms, tech-stack analysis, security headers, domain info.
Microsoft's search engine — use the site: operator to inspect index coverage.
Search on Bing ↗Auto fillPrivacy-focused engine — site: query for DDG's index.
Search on DuckDuckGo ↗Auto fillRussia's leading search engine — covers Eurasia audiences.
Search on Yandex ↗Auto fillThe largest North-American review platform — verify whether your brand has a profile.
Search on Yelp ↗Auto fillAnalyse the CMS, ad system, analytics, fonts and other tech your site uses.
Search on BuiltWith ↗Auto fillMaintained by Scott Helme — audits HTTP security response headers (CSP, HSTS…).
Open SecurityHeaders ↗Auto fillAuthoritative SSL/TLS scoring tool — outputs A+ through F security grades.
Open SSL Labs ↗Auto fillQuery your DNS from multiple global nodes — locate regional DNS failures.
Open DNS Checker ↗Auto fillCheck registration date, registrar and expiration to avoid losing the domain.
Lookup on Whois ↗Auto fillFree aggregator, no signup. All audits run on the listed third-party servers. Looo AI only:
Looo AI stores nothing. All logic runs in your browser; every tool button is a plain link to the third-party site that you can inspect by right-clicking.
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Want all of this consolidated into a single prioritized report? See pricing for Looo AI's unified dashboard.
The Looo AI dashboard (in development) will call these tools in parallel and translate the results into a business-language backlog.