Robots.txt Validator

Validate your robots.txt file and check which URLs are allowed or blocked.

What Is Robots.txt Validator?

Robots.txt Validator Validate your robots.txt file and check which URLs are allowed or blocked — free, instant, and no signup required. Validate your robots.txt file syntax and check which URLs are allowed or blocked. Free robots.txt validator for SEO and webmasters. It runs entirely in your browser so no data is sent to any server. No account needed, no usage limits, works on any device.

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How to Use Robots.txt Validator

Open Robots.txt Validator above, paste or enter your input, and results appear immediately. No button to press — the tool updates as you type. Use the copy button to grab your output. All robots.txt validator processing happens instantly in your browser.

Why Use Robots.txt Validator?

Robots.txt Validator is 100% free with no hidden costs. It works offline after the page loads since everything runs in your browser. Your data never leaves your device. There are no usage limits, no watermarks, and no forced sign-up. The interface works on desktop, tablet, and mobile.

Key Features

SEO analysis metrics
Search engine optimization insights
Content quality scoring
Best practice validation

Who Uses Robots.txt Validator?

Professional robots.txt validator tasks
Quick validate your robots.txt file and check which urls are allowed or blocked checks
Learning and practicing seo skills

Common Mistakes to Avoid

Not verifying that input data is properly formatted before submission
Assuming the tool handles edge cases that require manual validation

Tips for Robots.txt Validator

For best results with Robots.txt Validator: paste clean input without extra formatting. Use the copy button rather than selecting text manually. Bookmark this page for quick access. If you need related functionality, check the related tools in the sidebar. All results are generated locally — refreshing the page resets the input.

More SEO & Content Optimization

Robots.txt Validator is part of the SEO & Content Optimization topic. Explore related tools in this cluster:

Privacy & Security

Robots.txt Validator processes all data entirely within your browser using JavaScript. No text, files, or personal information is transmitted to any server. Your data stays on your device, making this tool safe for sensitive content. We do not track usage, store inputs, or share data with third parties. The tool works offline after the initial page load and requires no account to use.

Frequently Asked Questions

Find answers to common questions about this tool.

What directives does the validator check?

User-agent, Disallow, Allow, Crawl-delay, Sitemap, and Host. It validates the syntax of each directive and flags unknown or misspelled directives.

Does the tool check if the robots.txt blocks important resources?

Yes. It compares the disallowed paths against a list of common resources (CSS, JS, images) and warns if critical assets are blocked.

Can I fetch and validate a live URL's robots.txt?

Yes. Enter a domain URL and the tool fetches its robots.txt, validates it, and shows the parsed rules.

How are wildcard patterns and $ endings handled?

The validator supports Google's extended pattern matching: * matches any sequence, $ matches end of URL. Invalid patterns are flagged with explanations.

Does the validator check sitemap references?

Yes. It validates that sitemap URLs are properly formatted and reachable. Missing or invalid sitemap URLs are reported as errors.