Lab tools
Lab tools
Public utilities for SEO, DNS, TLS, email source, and copy-paste snippets. No account. Rate-limited. Private networks are blocked.
Header Checker
Inspect HTTP status, security, cache, and robots headers.
Sitemap Extractor
Pull every URL out of an XML sitemap or sitemap index.
Meta Inspector
Read title, description, canonical, Open Graph, and Twitter tags.
robots.txt Tester
View robots.txt groups and test whether a path is allowed.
Schema Extractor
Pull JSON-LD blocks and show every schema.org type on the page.
Heading Outline
List H1–H6 in order and flag a missing or extra H1.
Canonical & hreflang
Compare requested URL, canonical, og:url, and language alternates.
DNS Lookup
Read A, AAAA, MX, TXT, CNAME, and NS records. No HTTP fetch.
SSL Checker
See certificate subject, issuer, expiry, and SANs from the TLS handshake.
Email Source Analyzer
Paste headers, see the connecting IP, SPF/DKIM/DMARC, and whether From was spoofed.
Link Extractor
List internal, external, and nofollow links from a single page.
Image Alt Audit
Check which images have alt text. Images are not downloaded.
Keyword Density
Top terms on one page after stripping scripts and stopwords.
Generators
Copy meta tags, robots.txt, and 301 snippets. Runs in the browser.