Test and validate your robots.txt with this testing tool. Check if a URL is blocked, which statement is blocking it and for which user agent. You can also check if the resources for the page (CSS, JavaScript, images) are disallowed.
A robots.txt Tester is a diagnostic tool designed to help webmasters, developers, and SEO professionals analyze and validate their robots.txt file to ensure it is correctly instructing web crawlers (such as Googlebot, Bingbot, or others) on how to interact with the site. The robots.txt file, located at the root of a domain (e.g., example.com/robots.txt), tells search engine crawlers which parts of a website can or cannot be accessed and indexed.
Because the robots.txt file plays a critical role in managing crawl budgets, protecting sensitive directories, and preventing indexing of irrelevant or duplicate content, even a small error in syntax or logic can result in major SEO problems—such as blocking important pages from being indexed or accidentally allowing access to private files.
A robots.txt Tester allows you to test the rules before they go live, helping to avoid these issues.
The tester allows you to:
Enter your robots.txt content manually or fetch it from your live website
Simulate access requests by entering a specific URL path
Specify the user-agent (e.g., Googlebot, Bingbot, AhrefsBot) to see how each one is treated
Analyze the outcome, indicating whether access is allowed or disallowed based on the current rules
It visually explains which Disallow, Allow, or User-agent directives apply to a given request and highlights any syntax errors or logic conflicts.
Syntax Validation
Detects invalid directives, unsupported characters, or formatting issues.
URL Access Testing
Lets you input specific URLs and shows whether a given crawler can access that URL based on the rules.
User-Agent Simulation
Test rules for different bots individually—Googlebot, Googlebot-Image, Bingbot, etc.—to see how they are interpreted.
Highlighting Matched Rules
Shows which rule (Allow or Disallow) matched the test URL and determined the access result.
Live and Editable Testing
Many testers allow you to modify your robots.txt temporarily and test outcomes without affecting the live site, which is ideal for safe experimentation.
Warnings for SEO Risks
Flags critical issues like:
Blocking the entire site with Disallow: /
Blocking important pages or folders unintentionally
Using wildcards improperly
Testing before uploading a new robots.txt file
Verifying that bots can access important content
Checking if crawl restrictions are applied correctly across directories
Diagnosing indexation issues in search engines
Blocking sensitive files or folders from crawlers
Improper robots.txt rules can result in de-indexed pages, wasted crawl budget, or inaccessible assets like CSS/JS files, affecting how a website appears and performs in search results. A robots.txt Tester gives site owners full visibility and control over how bots interpret their crawl instructions, helping to avoid unintentional errors.
A robots.txt Tester is an essential tool for managing and troubleshooting crawl behavior on a website. It helps verify that search engine crawlers are correctly allowed or disallowed from accessing specific sections of your site. By offering simulation, rule validation, and instant feedback, this tool ensures that your robots.txt file is accurate, optimized, and SEO-friendly—safeguarding your website’s performance and visibility in search engines.
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