Free Noindex Checker
Verify whether any webpage or URL can be crawled and indexed by Google, Bing, and AI search engines. We inspect HTTP headers, X-Robots-Tag, HTML meta robots, robots.txt crawl rules, and canonical tags.
The 4 Critical Layers of Search Indexability
Technical Reference1. HTTP Status & Server Availability
Before search engine crawlers examine any page content, the web server must return an authoritative 200 OK HTTP response code. If the server returns 404 (Not Found), 410 (Gone), 403 (Forbidden), or 500 (Server Error), the URL cannot be indexed.
2. Robots.txt Crawl Permissions
The robots.txt file acts as the front door for search engine bots. If a rule specifies Disallow: /, search engines are instructed not to fetch the page content. Note: pages blocked in robots.txt may still appear in search results without snippets if linked externally.
3. HTML <meta name="robots"> Tag
The standard on-page mechanism to control indexing. Placing <meta name="robots" content="noindex"> in the <head> instructs Google and Bing to discard the page from the search index while continuing to crawl internal links if follow is specified.
4. HTTP Header X-Robots-Tag
An HTTP response header sent by the web server. It provides identical functionality to the HTML meta robots tag, but can be applied across non-HTML assets (such as PDFs, images, API endpoints, or entire subdomains via web server configuration).