Our free robots.txt Tester provides a professional, high-performance solution to test if a URL is allowed or blocked by a robots.txt file, simulate crawler user-agent access offline in your browser, 100% private directly within your browser. Engineered for maximum speed and absolute privacy, the tool operates entirely on the client side using secure local JavaScript processing—meaning your data never leaves your device and is never uploaded to any external server. Whether you are working on a desktop, tablet, or mobile phone, the responsive and premium interface delivers instant real-time results with zero wait times. Designed for daily productivity, it features fully configurable parameters, robust input verification, and offline capability to ensure a seamless, secure workflow.
Paste the content of your robots.txt file inside the left configuration panel.
Specify the relative directory pathway and select the crawl agent to simulate (e.g. Googlebot).
Instantly check the blocked/allowed verdict highlighting the exact policy trigger line number.
Tests robots.txt crawler directives to confirm search engine bots can access indexable page paths.
Check User-agent rules, Disallow directives, and Allow exceptions to prevent accidental indexing blocks.
Test robots.txt files with 100% client-side execution. No crawler rules or file directives are logged.
A robots.txt Tester evaluates URL pathways against Disallow and Allow directives according to the Robots Exclusion Protocol (REP) standard.
Search crawlers evaluate rules by User-Agent specificity and longest character path length. When an Allow and Disallow rule match the same target path, the longest, most explicit directive governs access.
Testing robots.txt policies before deployment prevents accidental de-indexing of critical landing pages and safeguards server crawl budgets from search bot exhaustion.