Inspect selected website and browser signals for troubleshooting and monitoring checks. A single request is a point-in-time observation, so repeat important tests from the production URL and compare them with server or provider records.
Website Tracking Tools5 free tools
Check SSL, links, compression, and your browser.
Most used
SSL Checker
Inspect the TLS certificate presented by a public HTTPS host to the PagesTools server. The report covers authorization, current validity, days remaining, subject, issuer, alternative names, protocol, cipher, and SHA-256 fingerprint.
Server · auto-deletedWhat is My Browser
See the browser and display details your current session reports locally. The tool uses User-Agent Client Hints when available, falls back to the user-agent string, and updates viewport dimensions as the window changes.
In your browserMore tools
Websites Broken Link Checker
Check a bounded sample of same-host links discovered on one public page. PagesTools tests up to thirty destinations, records final status or errors, and marks the report when additional links were left unchecked.
Server · auto-deletedCheck GZIP Compression
Check whether a public page responds with GZIP, Brotli, or another non-identity content encoding when compression is advertised. The report shows final URL, status, encoding, length, and Vary headers without estimating savings.
Server · auto-deletedSpider Simulator
View a bounded summary of the HTML one server-side fetch can see. The simulator reports status, metadata, headings, internal and external links, and a visible-text preview without pretending to reproduce a named search crawler.
Server · auto-deleted