Free, and no account
Free SEO tools
Three small tools that answer one question each, properly. They read the live address the way a search engine does, they are free however often you use them, and none of them asks for an email first.
Robots.txt tester
Read a site's robots.txt the way a crawler reads it, and find out whether Googlebot is actually allowed to fetch the address you care about.
Test a robots.txt →XML sitemap validator
Find a site's sitemap, read it the way a search engine does, and see whether it is valid, declared properly and within Google's limits.
Check a sitemap →Meta tag checker
See the title, description, canonical and robots tags a search engine is actually served for one page — and what is wrong with them.
Check a page →Or check everything at once
A full audit crawls up to 300 pages and runs all 101 checks on each of them, including everything these three tools do. Free, and no account for your first one.
Why these are free
No account, no card, and no email box standing between you and the answer. These three are how most people meet us, and we would rather you judged the work before being asked for anything. What the paid plans buy is search data about your site — rankings, competitors, backlinks — which costs real money every time it is fetched, and is a different thing entirely. It is on the pricing page.