Free Technical SEO Tool

Free Robots.txt Checker & Sitemap Validator

Test if Google and AI search can crawl your website. Check your robots.txt and llms.txt files, validate your XML sitemap, detect noindex tags, and trace redirect chains.

How This Crawl Checker Works

1

robots.txt

Check crawler access rules and sitemap references

2

Sitemap

Validate sitemap.xml structure and URL count

3

Indexability

Check meta robots, X-Robots, and canonical tags

4

Redirects

Trace redirect chains and identify issues

5

AI Crawlers

Check llms.txt and whether robots.txt blocks AI search bots

What This Crawl Checker Analyzes

✓

robots.txt Parsing

User agents, disallow/allow rules, sitemap references

✓

Crawler Blocking

Detect if robots.txt blocks search engines

✓

Sitemap Validation

Check sitemap.xml exists and is valid XML

✓

Sitemap URL Count

Count and sample URLs in your sitemap

✓

llms.txt

Markdown file that tells AI assistants what your site is about

✓

AI Crawler Access

Detect robots.txt rules blocking GPTBot, ClaudeBot, PerplexityBot

✓

Meta Robots

Check for noindex/nofollow directives

✓

X-Robots-Tag

HTTP header indexing directives

✓

Canonical Tags

Validate canonical URL setup

✓

Redirect Chains

Trace redirects and identify long chains

✓

301 vs 302

Identify non-permanent redirects

✓

Response Codes

HTTP status code verification

Crawlability Checker FAQ

What is crawlability?
Crawlability refers to search engines' ability to access and crawl your website's pages. If a page isn't crawlable, search engines can't index it, and it won't appear in search results.
What is robots.txt?
robots.txt is a text file at your website's root (domain.com/robots.txt) that tells search engine crawlers which pages they can and cannot access. It uses Disallow and Allow rules to control crawler behavior.
Why do I need a sitemap?
A sitemap (sitemap.xml) lists all the pages you want search engines to index. It helps them discover new content faster, especially pages with few internal links or new sites with limited backlinks.
What is llms.txt?
llms.txt is a plain Markdown file at your website's root (domain.com/llms.txt) that gives AI assistants like ChatGPT, Claude, and Perplexity a short summary of your business and links to your most important pages. It's an emerging standard, and it costs nothing to add.
What does noindex mean?
A noindex directive tells search engines not to include a page in search results. It can be set via meta robots tag or X-Robots-Tag HTTP header. Pages with noindex won't appear in Google search.
What is a redirect chain?
A redirect chain occurs when one URL redirects to another, which redirects to another, and so on. Long chains waste crawl budget and slow page loading. Best practice is to redirect directly to the final URL.
What's the difference between 301 and 302 redirects?
301 is a permanent redirect that passes link equity to the new URL. 302 is temporary and doesn't pass full link equity. Use 301 for permanent URL changes, 302 only for truly temporary moves.
Is this crawl checker free?
Yes, completely free with no signup required. You can check as many URLs as you want. We built this tool to help identify technical SEO issues that prevent proper crawling and indexing.

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