Free Website SEO Checker & Latency Diagnostic
Execute a live edge crawl on any public URL in ten seconds. Measure Time to First Byte (TTFB), TLS handshake integrity, Open Graph tags, heading structure, and sampled dead links.
DOM & Technical Signals Real-time Telemetry
Diagnostic Findings Prioritized Audit
Want full-site automated crawls with written fix instructions and paste-ready code? Create a free workspace to unlock automated recurring crawls and an Autonomous Remediation Brief™.
What the live diagnostic audits
Edge Latency (TTFB)
Server response time measured from edge proxies. Target is under 800 ms for optimal Core Web Vitals. Read the TTFB guide.
Transport & TLS
Validates HTTPS redirect chain and Strict-Transport-Security (HSTS) headers to protect visitor trust.
Metadata Hierarchy
Evaluates title length, meta description snippet truncation, canonical tags, and robots indexability.
Heading Structure
Audits single H1 compliance, logical H2/H3 nesting, and missing image alt tags for accessibility.
Internal Link Health
Crawls an active sample of internal page links to surface 404 dead ends. Why broken links hurt SEO.
Launch Readiness
Use before public launch alongside our Pre-Launch Technical SEO Checklist.
Frequently asked questions
What does the free SEO checker test?
It makes a real HTTP request to the URL you enter and reports the health score, response time (TTFB), HTTPS and HSTS, title and meta description, canonical tag, viewport, headings, images without alt text and a sample of internal links.
Is it really free?
Yes. You can run a few checks every 10 minutes without an account. A free workspace adds 3 full audits a month with audit history; paid plans add more audits and written Remediation Briefs.
Why is my score different from other tools?
Every tool weighs issues differently, and response time depends on where the request is made from. Use the individual findings rather than the score alone.
Can I check a site I don't own?
You can check any public web page. Private or internal network addresses are blocked.