Is your robots.txt working correctly?
Test and validate your robots.txt file instantly. Check syntax, parse directives, and verify which URLs are blocked from search engine crawlers.
What is Robots.txt?
Robots.txt is a plain text file at the root of your website that tells search engine crawlers which pages or sections they can and cannot access. It's part of the Robots Exclusion Protocol, a standard that all major search engines respect.
A misconfigured robots.txt can have serious consequences. An accidental "Disallow: /" blocks your entire site from search results. A missing "Allow" rule can prevent important pages from being crawled. And since changes take effect immediately, a bad edit during deployment can tank your search visibility overnight.
Robots.txt Tester parses your file, validates the syntax, and lets you test specific URLs against your rules — so you can catch problems before search engines do.
Everything you need to monitor robots.txt tester
Test and validate your robots.txt file for syntax errors and crawl directives.
Get more with Site Watcher
Monitor your entire web infrastructure from a single dashboard — uptime, SSL, domains, DNS, and vendor dependencies.
Check your websites every minute from multiple global locations. Track response times and uptime percentages.
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Monitor any public status page for incidents. Get alerted when cloud providers and third-party services go down.
Get even more with Site Health
Go beyond infrastructure monitoring. Site Health adds search performance, page speed, technical SEO, and WHOIS tracking to your monitoring suite.
Monitor your search performance and indexing status.
Track LCP, INP, and CLS to keep your site fast.
Get alerted when your robots.txt changes unexpectedly.
Monitor your XML sitemaps for changes and issues.
Track redirect chains and get alerted to new or broken redirects.
Monitor hreflang tags for consistency and errors.
Get alerted when WHOIS records change — registrar, nameservers, or ownership.
Free Robots.txt Testing
Test and validate any robots.txt file instantly. No account required.
Robots.txt Tester
- Syntax validation
- Directive parsing per user-agent
- URL testing against rules
- Crawl directive verification
Robots.txt Tester
- Instant robots.txt validation
- Parse and display all crawl directives per user-agent.
- Test specific URLs against your robots.txt rules.
- Use the tool instantly without signing up.
Or monitor everything from one dashboard
Site Watcher bundles all 5 monitoring tools — domain expiry, SSL, uptime, DNS, and vendor status — into a single dashboard with unified alerting.
Site Watcher
- Up to 3 monitored targets
- All 5 tools in one dashboard
- Smart check cadence
- Email alerts
- 30-day history
Site Watcher Pro
- Unlimited targets across all tools
- Domain expiry + SSL + Uptime + DNS + Vendor status
- Consolidated alerts
- Roll-up site status
- 1-year history
- Bulk import
Site Health Pro
- Everything in Site Watcher Pro
- Google Search Console integration
- Core Web Vitals monitoring (LCP, INP, CLS)
- Robots.txt change monitoring
- Sitemap change monitoring
- Redirect chain monitoring
- Hreflang monitoring
- WHOIS change monitoring
Test your robots.txt
Validate your robots.txt file and catch configuration errors instantly.