BeaverCheck — 100+ Website Checks in One ScanSkip to content
Browse & Analyze<br>HistoryBrowse recent website audits and performance trends
TechnologiesExplore technology stacks detected across the web
CompareSide-by-side technology comparisons and market share
StacksCurated technology stacks and the sites that use them
ReportsEditorial deep-dives on the state of web performance
FaviconsBrowse and download favicons from analyzed websites
Learn<br>FAQCommon questions about BeaverCheck scores and checks
How We ScoreHow we calculate scores across 100+ checks
AboutThe story behind BeaverCheck and the team
LearnPractical guides to fix common web performance issues
Migration GuidesStep-by-step guides for moving between web technologies
GlossaryDefinitions for performance, SEO, and web platform terms
Contrast CheckerCheck WCAG color contrast ratios between any two colors
HTTP HeadersInspect HTTP response headers for any URL
SSL CheckerAnalyze SSL/TLS certificate details and chain
DNS LookupLook up DNS records for any domain
Redirect CheckerTrace the full redirect chain for any URL
INP CheckerReal-user INP and Core Web Vitals from Google's Chrome UX Report.
APIRESTful API for programmatic website audits
BadgeEmbed an auto-updating health score badge on your site
BeaverCheck<br>DiscoverHistoryTechnologiesCompareStacksReportsFaviconsFAQHow We ScoreAboutLearnMigration GuidesGlossary
Free Tools Contrast CheckerHTTP HeadersSSL CheckerDNS LookupRedirect CheckerINP Checker
Developers APIBadge
Free · No login · 30-second website audit<br>See what's wrong.<br>Fix what matters.<br>Paste any URL. 100+ checks across performance, security, SEO, accessibility, and more — in 30 seconds.<br>Website<br>example.com Run Audit Running 100+ checks on your site…
Advanced options Test from a specific location<br>Any location Brazil · Sao Paulo Netherlands · Amsterdam Singapore · Singapore Spain · Madrid United Stated · New York United States · Santa Clara
8,012 sites scanned · Try: github.com vercel.com stripe.com<br>You're submitting too quickly. Please wait a minute and try again.<br>Could not reach the server. Check your connection and try again.
news.ycombinator.com B · 5m ago stonehousesafety.com B · 1h ago skippa.cc B · 20h ago norriq.shop B · 23h ago mindmx.org B · 23h ago news.ycombinator.com B · 5m ago stonehousesafety.com B · 1h ago skippa.cc B · 20h ago norriq.shop B · 23h ago mindmx.org B · 23h ago
Product tour<br>See the audit in motion<br>17 seconds of what BeaverCheck does -- composite score, Lighthouse mobile + desktop, top priorities ranked by impact, and per-category drill-downs. No login. Free forever.
Recent audit<br>See a real audit, end to end<br>Here's an actual BeaverCheck report for stripe.com -- composite score, 8 categories, Lighthouse mobile + desktop, top priorities, business case. Click to explore.
No login. No payment. Every report URL stays live forever, shareable with your team.
Everything in one report<br>One audit, every surface that matters: Lighthouse mobile + desktop, prioritized fixes ranked by impact, and per-category drill-downs with row-level findings.
Lighthouse mobile + desktop<br>Both viewports run end-to-end. Performance, Accessibility, Best Practices, SEO scores plus all six Core Web Vitals (FCP, LCP, TBT, CLS, SI, TTI) per device.
Top priorities, ranked by impact<br>The 5 fixes that move the score the most -- with category context, severity, and a one-click 'Download for AI agent' export so Cursor/Claude/Copilot can actually fix them.
Per-category drill-down<br>Click into any of the 8 categories for the full check list, row-level findings, severity grades, and detailed fix guidance for each issue.
What we check<br>116 scored checks across 9 categories<br>Every audit runs the same comprehensive checklist. Plus the full Lighthouse suite, mobile and desktop, with hundreds of individual audits.
Performance<br>15 checks<br>• Lighthouse Performance score (mobile + desktop)<br>• Core Web Vitals: LCP, INP, CLS<br>• CrUX real-user data (28-day P75)<br>• Render-blocking resource detection<br>• Third-party payload impact analysis<br>• Server response intelligence (Cache-Status, Vary, ETag)<br>• Resource hints & font loading audit
Security<br>25 checks<br>• SSL certificate chain & expiry monitoring<br>• Security headers analysis (CSP, HSTS, X-Frame)<br>• Content Security Policy deep analysis<br>• Bot challenge detection (Cloudflare, DataDome, Akamai, etc.)<br>• Login page hardening (CSRF, captcha, SSO, password reset)<br>• CORS depth, Permissions-Policy, Referrer-Policy strictness<br>• Subresource Integrity adoption on third-party scripts<br>• Soft-404, empty-page, geo-restriction, maintenance-mode detection<br>• Vulnerable JavaScript libraries (CVE matching)<br>• Cookie security flags
Accessibility<br>14 checks<br>• Lighthouse Accessibility score<br>• Screenshot contrast analysis (text over images)<br>• Heading hierarchy validation<br>• Heading text quality (placeholder, length, all-caps)<br>• ARIA landmarks detection<br>• Color contrast (CSS + pixel-sampled)<br>• Image alt text audit
SEO<br>13 checks<br>•...