Best Free Tools to Analyze Any Website
Whether you're researching competitors, auditing your own site, or evaluating a potential partner, these tools give you deep insights — all free, no signup.
1. Technology Detector
Technology Detector identifies 200+ frameworks, CMS platforms, CDNs, and analytics tools used on any website.
Use case: Competitor research — see what tech stack successful sites use.
2. SEO Analyzer
SEO Analyzer gives a comprehensive SEO score with title, heading, content, and technical analysis.
Use case: Quick SEO health check before launching a campaign.
3. Page Speed Analyzer
Technology Detector measures load time, blocking resources, and gives optimization recommendations.
Use case: Performance optimization and Core Web Vitals improvement.
4. SSL Certificate Checker
SSL Certificate Checker verifies SSL validity, expiration, and certificate chain.
Use case: Security audit and trust verification.
5. Website Stack Summary
Technology Detector provides a one-page overview of CMS, CDN, frameworks, analytics, and security.
Use case: Quick competitive intelligence report.
6. Google Ads Scraper
Technology Detector finds all active ads running for any domain via Google Ads Transparency Center.
Use case: Competitive advertising intelligence.
7. HTTP Security Headers Grader
SSL Certificate Checker grades security headers with A-F scoring.
Use case: Security posture assessment.
8. Website Comparison
Website Comparison compares two websites side by side on speed, structure, and SEO.
Use case: Benchmarking against competitors.
9. DNS Record Checker
Website Owner Finder shows all DNS records including email (MX, SPF, DMARC).
Use case: DNS troubleshooting and email config verification.
10. Contact Page Finder
Lead Generation discovers contact info, emails, and social profiles.
Use case: Business outreach and partnership research.
Try Them All
What these tools do not cover
None of the analysers above check accessibility, and it is the gap that catches most site owners out — an audit can come back clean while the checkout is unusable with a keyboard. For that layer, run a free WCAG accessibility scan alongside whichever SEO tool you pick.
All tools above are available at Krawly.io — 55+ free tools, no signup needed.