Robots.txt Checker

• Publisher
  Mansoor Bhanpurawala
• Websitedigitalmansoor.com
• Published date2026/09/24
• Views00 views

Robots.txt Checker is a free, browser-based SEO utility from Digital Mansoor that parses a pasted robots.txt file, reports syntax errors and deprecated directives, scores the file out of 100, and simulates whether a given URL path is allowed for a specific crawler.

What is the Robots.txt Checker?

The Robots.txt Checker is an interactive validation tool on digitalmansoor.com that takes a pasted robots.txt file as input and returns a syntax and SEO diagnostic report. It parses user-agent rule groups, flags malformed directives such as a missing colon separator, marks deprecated tags such as the Host directive, extracts Sitemap declarations, and produces an SEO health score out of 100 with separate error, warning, and passed counts. It runs entirely in the browser with no account required, and is published by SEO consultant Mansoor Bhanpurawala as part of the site's Free SEO Tools collection.

What makes the Robots.txt Checker stand out?

• Real-time syntax audit — paste or type robots.txt content (a live counter shows lines and characters) and the analyzer reports the exact line numbers of errors and warnings.
• SEO health score — a single score from 0 to 100 with breakdowns by Errors, Warnings, and Passed checks; the page's own worked example scores 67/100 with the label "Action Required".
• URL path access tester — choose a crawler (User-agent: *, Googlebot, or Bingbot), enter a path such as /wp-admin/admin-ajax.php, and get an Allowed or Disallowed verdict derived from the parsed rules.
• Deprecated directive detection — warns on directives Google no longer honors, including the Host directive, and on accidental site-wide disallows.
• Sitemap and rule group extraction — shows the XML sitemap declarations detected in the file and breaks the content into user-agent rule groups.
• Cleaned robots.txt output — generates a standardized file with spacing issues, unparsed directives, and duplications removed, plus a one-click Copy Fixed robots.txt button.
• Crawl-delay review — surfaces crawl-delay instructions so you can check whether a value such as 10 risks overloading your server.
• Sample data loader — a Load Sample Data button fills the input with WordPress-style default rules for quick testing.

How does the Robots.txt Checker work?

Paste your robots.txt rules into the input field (or click Load Sample Data), then run the analysis to trigger the syntax and health audit. Review the 0-100 SEO health score with its error, warning, and passed breakdown, read the issue log to locate offending line numbers, test individual paths against a chosen user-agent, and copy the standardized file from the Cleaned and Optimized output box back to your server.

What can you do with the Robots.txt Checker?

• Troubleshoot indexing problems: test whether a path that is missing from search results or flagged in Google Search Console is actually disallowed for Googlebot, then correct the offending Disallow line.
• Validate before deploying: run a rewritten robots.txt through the checker during a site migration so no accidental global disallow reaches production.
• Audit crawl settings: confirm Sitemap declarations are present and review Crawl-delay values before including them in a client technical SEO report.

Who is it for?

• SEO specialists and agencies — audit a client's robots.txt configuration, diagnose crawl blockages, and hand a corrected file to the developer.
• Web developers and sysadmins — validate directive syntax and verify access rules before pushing code or configuration to production.
• Website owners and bloggers — keep private directories disallowed while confirming that public content stays crawlable.

FAQ

Is the Robots.txt Checker free?

Yes. It is listed among Digital Mansoor's Free SEO Tools, runs in the browser, and requires no signup or payment. You paste the robots.txt content directly into the tool rather than pointing it at a live URL.

Can it tell me whether a specific URL is blocked?

Yes. The Test URL Path Access panel lets you select a user-agent such as Googlebot, Bingbot, or the wildcard entry, type a path like /wp-admin/admin-ajax.php, and get an Allowed or Disallowed result based on the parsed rules.

What syntax problems does it detect?

It flags malformed directives such as a Disallow line missing its colon separator, deprecated tags such as Host, accidental site-wide disallows, spacing problems inside key-value pairs, duplicated directives, and lines it cannot parse into a known directive.

Does it write a corrected robots.txt for me?

It generates a cleaned and standardized version with spacing, unparsed directive, and duplication issues removed. You copy that output and upload it to your server to replace the original file.