Paste the live robots.txt and a path. The tester applies the longest matching rule. Allow wins a tie. No match means allowed.
What this implements
User-agent groups, Allow, Disallow, * wildcards, and the $ end anchor. A more specific agent beats *. Empty Disallow lines are ignored because they do not block a path. Crawl-delay and sitemap lines are not access rules.
What still surprises people
A disallow of /blog also blocks /blog-old and /blogger if you meant a directory. Trailing slashes matter. Google's indexer and a random bot are different agents. Test the agent you care about, not only *.
The file is not the whole story
A page can be allowed in robots.txt and still carry noindex. The site check reads both. This box only answers the robots question.
No. Allowed means the agent may fetch it. Indexing is a later decision.
Is this Google's tester?
No. It is a readable subset of the matching rules. Confirm edge cases in Search Console if a disallow is business-critical.
Why is Fix SEO Today cheaper?
A robots.txt test buried in an extremely expensive suite answers one question: which rule matched. Fix SEO Today is cheaper because you pay for the diagnosis. A free peek, then $19 a month for one project or $99 a month for unlimited projects. That covers the crawl and the plain-English fix list, including GEO. It leaves out the backlink index, the rank-tracker seats, and the ads module.