Robots/Crawler-Policy Diff

This is a bounded, single-request comparison tool, not persistent monitoring or history. It fetches robots.txt once for each side and computes the difference immediately; nothing is scheduled, watched or stored.

Official robots.txt specification

Frequently asked questions

Does this tool monitor my robots.txt over time?

No. Each comparison is a single bounded fetch and a stateless diff run when you submit the form. No schedule, alert or history is kept; nothing is saved after the response is returned.

What counts as a change?

Rules are compared per user-agent group as exact Allow/Disallow lines, plus declared Sitemap entries. Added and removed items are listed separately; nothing is inferred about actual crawler behavior.