SEO tools
Free SEO Tools
Single-purpose checkers that run one part of the DomainLens audit against any URL. Each one explains what it tests and what the result does not prove.
Robots.txt Checker
Fetches the robots.txt file for the host you enter, reports whether it exists and whether it blocks every crawler, and reads the page-level robots directives alongside it.
Sitemap Validator
Looks for the sitemap the way a crawler does — the robots.txt declaration first, then the conventional locations — then confirms it parses as XML and counts the URLs inside it.
Canonical Tag Checker
Reads the canonical URL a page declares, then fetches that URL to confirm it resolves, is not redirected, and is not noindexed — the three ways a canonical silently becomes inert.
Schema Markup Validator
Parses the structured data on the page you enter, lists the schema.org types it finds, and flags blocks that fail to parse or are missing the properties their type requires.
Redirect Checker
Follows the URL you enter through every hop, reporting the status code at each step and the final destination — the detail a browser hides once the address bar settles.
Indexability Checker
Checks every signal that decides whether a page is allowed into the index — the status code, robots.txt access, meta robots, the X-Robots-Tag header, and the canonical.
Run a fresh DomainLens audit and use the report as your priority list.