robots.txt Checker & Tester

Check and validate robots.txt for any website online free. Test crawl rules, user-agent directives, sitemap references, and detect SEO issues that block search engines.

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APIPOST /api/v1/web/robots
4.8(43 votes)
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Try also: HTTP Headers
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Key Features

100% Free

No registration required, unlimited checks

Instant Results

Real-time analysis with detailed output

REST API Access

Integrate into your workflow via API

Accurate Data

Live queries to authoritative sources

What is robots.txt Checker & Tester?

The robots.txt checker and tester fetches, parses, and validates the robots.txt file for any website. It analyzes all user-agent directives, disallow and allow rules, crawl-delay settings, and sitemap references. The tool highlights potential SEO problems like accidentally blocked pages, missing sitemaps, overly broad disallow rules, and syntax errors.

A misconfigured robots.txt can prevent Google, Bing, and other search engines from crawling and indexing your important pages — leading to traffic loss. Use this tool to verify your robots.txt is working correctly, test changes before deploying, and ensure search engines can access all the pages you want indexed.

How to Use

  1. 1Enter any website URL or domain name (e.g., example.com)
  2. 2Click 'Run Check' to fetch and parse the robots.txt file
  3. 3Review each user-agent block and its crawl rules
  4. 4Check disallow and allow directives for blocked pages
  5. 5Verify sitemap references are present and correct
  6. 6Look for warnings about common SEO misconfigurations

Who Uses This

System Administrators

Monitor and troubleshoot infrastructure

Developers

Debug network issues and integrate via API

SEO Specialists

Verify domain configuration and performance

Security Analysts

Audit and assess network security

Frequently Asked Questions

What is robots.txt?
robots.txt is a text file at the root of a website (e.g., example.com/robots.txt) that tells search engine crawlers which pages or directories to crawl and which to skip. It follows the Robots Exclusion Protocol standard and is read by Googlebot, Bingbot, and other crawlers before they access your site.
How do I check if my robots.txt is working correctly?
Enter your domain in the tool and run the check. It will fetch your robots.txt, parse all directives, and highlight any issues like syntax errors, overly broad disallow rules, or missing sitemap references. You can also manually view your file at yourdomain.com/robots.txt.
Does robots.txt affect SEO?
Yes, significantly. A misconfigured robots.txt can accidentally block search engines from crawling important pages, causing them to be deindexed. Common mistakes include blocking CSS/JS files (which hurts rendering), blocking entire directories that contain important content, or forgetting to add a sitemap reference.
What is the difference between Disallow and Allow in robots.txt?
Disallow tells crawlers not to access a URL path. Allow overrides a Disallow for specific paths within a blocked directory. For example, you can Disallow /admin/ but Allow /admin/public-page. The order matters — more specific rules take priority.
Should I block all bots or specific ones?
Use User-agent: * for rules that apply to all crawlers. Only block specific bots if needed — for example, blocking aggressive scrapers while allowing Googlebot and Bingbot. Blocking all bots with Disallow: / will remove your site from search results entirely.

Related Articles

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API Endpoint

POST /api/v1/web/robots
View Documentation