CrawlerCheck is a free, fast, and essential online tool designed for SEO professionals and webmasters to instantly verify how search engine bots and AI crawlers interact with their websites. It provides a comprehensive crawl test for major user-agents like Googlebot, Bingbot, ChatGPT-User, Claude, and Perplexity, ensuring your site's content is accessible or blocked exactly as intended.
The tool works by meticulously analyzing three critical technical SEO elements: your site's robots.txt file, meta robots tags embedded in HTML pages, and X-Robots-Tag HTTP headers sent by your server. This deep analysis provides a clear report on which user-agents are allowed or disallowed for any given URL, helping to prevent costly SEO mistakes that can hurt rankings and visibility.
Key features and use cases include:
- Instant Crawler Checker: Quickly determine if major search engine and AI crawlers are allowed or blocked from accessing specific URLs and pages on your website. This includes a wide array of supported crawlers such as Googlebot, Bingbot, YandexBot, ChatGPT-User, GPTBot, AhrefsBot, SemrushBot, Facebookbot, and many more, covering search engines, AI/LLMs, SEO tools, social media, and security bots.
- Avoid Costly SEO Mistakes: Verify your crawl rules to optimize your website for improved visibility on search engines and AI platforms. Accidental blocks can severely impact organic traffic and indexing.
- Comprehensive Analysis: CrawlerCheck goes beyond simple robots.txt checks by also evaluating meta robots tags and X-Robots-Tag HTTP headers, offering a complete picture of crawler access directives.
- Improve SEO Visibility: Utilize actionable insights from reports to optimize your crawl budget by identifying and blocking low-value pages, ensuring critical resources (CSS, JS, images) are accessible, including sitemap references, and refining crawl rules.
- Diagnose and Fix Common Issues: The tool helps in identifying and resolving frequent problems like unintentionally blocked URLs, server errors (5xx), missing pages (404), excessive URL parameters, JavaScript-rendered content issues, poor internal linking, user-agent blocking, and mobile usability problems. It also provides specific debugging steps for "Indexed, though blocked by robots.txt" and "Crawled - Currently Not Indexed" errors.
- Control AI Bot Access: Specifically check and confirm if AI crawlers like ChatGPT, Claude, or Perplexity can read your site, allowing you to block them if concerns about bandwidth, data privacy, or content scraping arise. This is crucial for showing intent and potentially useful in legal contexts regarding AI content usage.
- Save Crawl Budget: For larger sites, blocking irrelevant bots ensures that valuable crawl budget is focused on your most important pages, leading to more efficient indexing.
- Test Specific Pages: The tool allows testing of any URL, not just the homepage, providing granular control over crawlability checks across your entire site.
CrawlerCheck is an indispensable resource for anyone managing a website, offering peace of mind that their content is being accessed and indexed according to their strategic goals, whether that means maximizing visibility or protecting specific content from certain bots.
