Robots.txt Checker — Check & Validate Your robots.txt File
Check if Google can crawl your important pages before rankings drop. Use this free robots.txt checker to validate syntax and test whether specific URLs are blocked or allowed — all in seconds, no login required.
- Instantly see if your URLs are BLOCKED or ALLOWED
- Works exactly like Googlebot
- No login • 100% browser-based
No login. Privacy-friendly. Runs in your browser.
Used by developers and SEO professionals worldwide
Check robots.txt file instantly
- Check robots.txt file for errors
- Verify if a URL is blocked or allowed
- Test robots.txt like Googlebot
What is a robots.txt checker?
A robots.txt checker (also called a robots.txt validator or robots.txt tester) is a tool that reads your robots.txt file, checks it for syntax errors, and simulates how search engine crawlers interpret your rules. Instead of waiting for Googlebot to re-crawl your site, a checker gives you instant feedback — telling you exactly which pages are allowed, which are blocked, and which rule is responsible.
A misconfigured robots.txt file is one of the most common (and silent) technical SEO problems. A single typo or overly broad Disallow rule can block entire sections of your site from Google — and you won't notice until rankings drop. Regularly using a check robots.txt tool prevents these issues before they go live. You can also check your robots.txt file instantly using our tester tool.
Validate syntax
Catch missing slashes, invalid directives, and formatting errors
Test URL blocking
Enter any path to see if it's allowed or blocked by your rules
Debug crawl issues
Find the exact rule causing a block and fix it instantly
How to check your robots.txt file
Follow these five steps to validate robots.txt and confirm every rule is working as intended:
1
Open your live robots.txt file
Visit yoursite.com/robots.txt in a browser. Copy all the content — every line from User-agent to Sitemap.
2
Paste it into the robots.txt checker
Open our free tester and paste your content into the textarea. It handles files of any size.
3
Click Validate & Test
The checker scans every line for syntax errors, invalid directives, and common misconfigurations. You'll see a clear pass / warning / error summary.
4
Enter a URL path to check
Type a path like /admin/ or /products/shoes and select a user-agent (Googlebot, Bingbot, etc.). The tool instantly tells you if the URL is allowed or blocked — and which specific rule caused the result.
5
Fix errors and re-check
Use our robots.txt generator to rebuild your file correctly, then re-paste and re-check. Repeat until every important URL shows Allowed and every blocked path shows Blocked.
Use our Robots.txt Tester to check your file instantly
Our free robots.txt checker validates syntax, tests URL paths, and runs entirely in your browser — nothing is uploaded to any server.
Used by developers, SEO professionals, and website owners worldwide.
When should you check your robots.txt?
Any time your robots.txt file changes — or you notice unexpected drops in crawled pages — is a good time to run a quick check. In particular, always check robots.txt after:
- Migrating to a new CMS or platform (the default robots.txt often blocks too much)
- Launching a staging-to-production push (staging sites should block all — production sites should not)
- Adding new sections of your site (product categories, blog, or international subfolders)
- Installing new SEO plugins that may rewrite your robots.txt automatically
- Noticing unexplained drops in organic traffic or Google Search Console crawl stats
For a full set of rules to follow when configuring your file, read our robots.txt best practices guide. For copy-ready templates, browse the robots.txt examples library.
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Frequently Asked Questions
Common questions about checking and validating robots.txt files.
What does a robots.txt checker do?
A robots.txt checker reads your robots.txt file, scans it for syntax errors and invalid directives, and simulates how search engine crawlers interpret your rules. It lets you test specific URL paths to see whether they would be allowed or blocked — without waiting for Google to re-crawl your site.
How do I check my robots.txt file?
The fastest way is to paste your robots.txt content into our free checker, click Validate & Test, then enter the URL paths you want to verify. The tool shows you a clear allowed / blocked result for each path, along with the exact rule responsible. You can also visit yoursite.com/robots.txt directly in a browser to confirm the file is publicly accessible.
How is a robots.txt checker different from a validator?
A validator checks your file's syntax — missing slashes, invalid directive names, incorrect formatting. A checker goes further: it also simulates how bots actually interpret your rules and tells you whether a specific URL path is allowed or blocked. Our free tool does both in one step.
Does checking robots.txt affect my live site?
No. Our robots.txt checker runs entirely in your browser. Nothing is sent to any server and your robots.txt content is never stored. You can safely check, modify, and re-check your file as many times as you need — without any impact on your live site.
Which user-agents should I test with?
Always test with Googlebot — it's the most important crawler for organic search. If you have rules targeting other bots, test with those too: Bingbot for Bing, GPTBot or ChatGPT-User for AI scrapers, AhrefsBot and SemrushBot for SEO tools. Different user-agents can have different rules in the same file, so always test the specific bot whose behaviour you care about.