Technical SEO

HTTP headers, SSL, DNS, security, and crawlability.

SEO Checker

On-page score with meta, structure, quality, and link indicators

SEO Compare

Compare on-page scores for two URLs side by side

Redirect Checker

Trace redirect chains with status codes and timing

Page Indexability Checker

Audit page indexability signals

Noindex Checker

Detect noindex on a page

Robots vs Noindex Conflict

Detect crawl vs index conflicts

Server Status Checker

Check server response for a URL

HTTP Status Checker

Show HTTP status code

HTTP Headers Checker

Inspect response headers

Redirect Chain Checker

Trace redirect chains safely

Redirect Codes Checker

Classify redirect status codes

Redirect Loop Detector

Detect redirect loops

HTTPS Checker

Verify HTTPS availability

SSL Certificate Checker

Inspect SSL certificate details

SSL Expiry Checker

Show SSL certificate expiry

Mixed Content Checker

Find HTTP assets on HTTPS pages

HTTP/2 Checker

Check HTTP/2 support when possible

HTTP/3 Checker

Check HTTP/3 or report unavailable

GZIP Checker

Check GZIP compression

Brotli Checker

Check Brotli compression

Cache-Control Checker

Inspect Cache-Control header

Expires Header Checker

Inspect Expires header

ETag Checker

Inspect ETag header

HSTS Checker

Inspect Strict-Transport-Security

Content-Type Checker

Inspect Content-Type header

Content-Length Checker

Inspect Content-Length header

X-Robots-Tag Checker

Inspect X-Robots-Tag header

CORS Checker

Inspect CORS headers

CSP Checker

Inspect Content-Security-Policy

Security Headers Checker

Review key security headers

DNS Checker

Show basic DNS records

Nameservers Checker

Show domain nameservers

A Record Checker

Lookup A records

AAAA Record Checker

Lookup AAAA records

CNAME Record Checker

Lookup CNAME records

TXT Record Checker

Lookup TXT records

DNS Response Time Checker

Estimate DNS lookup time

CDN Checker

Detect CDN signals

Cloudflare Checker

Detect Cloudflare signals

Server IP Checker

Show public server IP

Server Location Checker

Estimate server location via optional API

Uptime Checker

Check if a site is reachable now

Page Size Checker

Estimate HTML page size

Page Requests Checker

Estimate resource requests from HTML

Code to Text Ratio

Calculate code-to-text ratio

Noscript Checker

Inspect noscript fallback content

Page Without JavaScript View

Show raw text without executing JS

Mobile Friendly Signals

Check basic mobile-friendly signals

Viewport Checker

Inspect viewport meta tag

Language & RTL Checker

Inspect lang and dir attributes

HTML Lang Checker

Inspect HTML lang attribute

UTF-8 Encoding Checker

Check UTF-8 encoding signals

Soft 404 Checker

Look for soft 404 indicators

SEO Tool Library

SEO checkers, generators, and calculators in one place.

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