Robots.txt Checker

Read a site's robots.txt as crawlers do: rules for each user-agent, the sitemaps it lists, and whether it accidentally blocks search engines.

FAQ

Does Disallow keep a page out of Google?
No. It stops crawling, but a blocked URL can still be indexed from links. Use a noindex tag on a crawlable page to keep it out.
Do I need a robots.txt?
Not strictly, but it's the standard place to list your sitemap, and without one some crawlers log errors.