Free Online Checkers
11 free checkers that run entirely in your browser. Nothing you paste here is sent to a server.
Filtered by type "checker" Clear filter
Cryptography (1)
Code Utilities (1)
SEO Tools (9)
On Page SEO Checker
Check a page's title, meta description, robots tag, canonical, and H1 count.
Canonical URL Checker
Check the canonical tag a page declares.
Hreflang Checker
List the hreflang tags a page declares for international targeting.
Page Size Checker
Check the byte size of a page's HTML document.
Redirect Checker
Trace the redirect chain for a URL.
Broken Link Checker
Check the first links on a page for broken (4xx/5xx) responses.
Code-to-Text Ratio Checker
Check the ratio of visible text to total HTML size for a page.
Search Engine Spider Simulator
See a page's title and text as a non-JavaScript search crawler would.
Domain Age Checker
Check how long ago a domain was registered.