Website & HTTP Diagnostics

Read the TLS certificate a server presents, or a pasted PEM: names, issuer, validity dates, days left, key, fingerprints and hostname match.

Test which TLS versions a server accepts, the cipher suite it negotiates, weak suites and HSTS, with an A+ to F grade that explains every cap.

Check the chain a server sends, or a pasted PEM bundle: order, missing intermediates, CA flags, dates, and whether each certificate is signed by the next.

Check whether a site serves HTTP/2, verified by a Globalping probe, and whether it advertises HTTP/3 in its Alt-Svc header.

Request a URL from Globalping probes in the regions or countries you choose and compare status codes and DNS, connect, TLS and first-byte times by location.

A one-time check of whether a website answers right now: one request from 3 to 5 Globalping probes worldwide, with each probe's status code and time.

Fetch or paste a robots.txt file, check it against RFC 9309 and test whether a crawler may fetch the paths you list.

Validate an XML sitemap or sitemap index against the sitemaps.org protocol: structure, URLs, lastmod dates, limits and hreflang alternates.

List every URL in an XML or text sitemap, filtered, de-duplicated and sorted by lastmod, as plain text or a CSV table.

Fetch a page and check its rel="canonical" link and Link header, the redirects before it, the canonical target and the hreflang set.

Read a page's Open Graph and Twitter/X card tags and see the title, description, image URL and site name a shared link would use.

List every link on a web page with its resolved URL, anchor text, rel values and internal or external type, as a table, a list or CSV.

Have the Mutqan server request the links of a web page and list which answer with an error, redirect or no answer at all.

See which CMS, frameworks, servers, CDNs and analytics a website shows signals of, with the header, cookie or script behind every match.

Audit a URL's redirect chain hop by hop: permanent or temporary, HTTPS upgrade, host changes, loops, slow hops, lost paths and meta refresh.

List the favicons, Apple touch icons and manifest link a page declares and check that each icon file answers with an image.

Find and validate a site's web app manifest, or a pasted one: members, start_url and scope, display mode, icons and install readiness.

Fetch a URL and see how browsers and CDNs may cache it: Cache-Control, lifetime, ETag and Last-Modified, Vary, Age and the CDN cache status.

Check whether a URL is served compressed with gzip or Brotli, compare the sizes reported for each encoding and the Vary header.

Validate Content-Type headers and check that a response body actually matches its declared media type.