What if the site has no robots.txt?

That’s reported directly — a missing robots.txt is valid (it means "no restrictions stated"), not an error.

Does this tool store the domains I check?

No — nothing is logged or stored.

Robots.txt Checker

Fetch and parse a live site’s robots.txt — user-agent rules and listed sitemaps.

URL

The URL is fetched from our server (an arbitrary cross-origin fetch isn't possible directly from your browser) — the target site sees this server's request, not your IP, and nothing about the check is stored.

Related tools

HTTP Status Checker
Redirect Chain Viewer
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How it works

1
Enter a domain

Just the site, e.g. https://example.com.
2
robots.txt fetched from its root

The tool requests /robots.txt on that domain automatically.
3
Rules parsed and shown

Per user-agent Allow/Disallow rules, plus any Sitemap lines.

FAQ

What if the site has no robots.txt?: That’s reported directly — a missing robots.txt is valid (it means "no restrictions stated"), not an error.
Does this tool store the domains I check?: No — nothing is logged or stored.