--- title: "robots · Meta Tag · zhead" canonical_url: "https://zhead.dev/meta/robots" last_updated: "2026-08-19T02:35:55.542Z" meta: description: "Sets page-level rules for compliant search crawlers, including whether the page may appear in results and what previews may be shown. It does not block access to the page." "og:description": "Sets page-level rules for compliant search crawlers, including whether the page may appear in results and what previews may be shown. It does not block access to the page." "og:title": "robots · Meta Tag · zhead" --- Meta tags # robots Sets page-level rules for compliant search crawlers, including whether the page may appear in results and what previews may be shown. It does not block access to the page. ## Parameters all Applies no indexing or search presentation restrictions. This is the default. ``` ``` noindex Prevents the page from appearing in search results. ``` ``` nofollow Tells crawlers not to follow links on the page. ``` ``` none Equivalent to noindex, nofollow. ``` ``` nosnippet Prevents a text snippet or video preview in search results. ``` ``` indexifembedded Lets Google index an embedded page despite noindex. It works only when combined with noindex. ``` ``` max-snippet:120 Limits a Google text snippet to 120 characters. ``` ``` max-image-preview:large Allows Google to show an image preview as wide as the result viewport. ``` ``` max-video-preview:-1 Allows Google to show a video preview of any length. ``` ``` notranslate Prevents Google from offering a translated result for the page. ``` ``` noimageindex Prevents Google from indexing images on the page. ``` ``` unavailable\_after: 2030-12-31 Removes the page from Google results after a valid date or time. ``` ``` ## Code examples Good example ``` ``` Prevents compliant search engines from showing the page in their results. Good example ``` ``` Limits the Google text snippet and permits a large image preview. Avoid this example ``` ``` These are defaults for Google, so the tag adds no restriction. Avoid this example ``` ``` Google ignores this historical rule because cached links no longer exist in Google Search. ## Recommendations - 01 Let Crawlers Read the Tag Do not block the page in robots.txt when relying on noindex. A crawler must fetch the page before it can see this metadata. - 02 Skip Default Rules Google’s default has no restrictions, so all and index, follow add no useful instruction. - 03 Expect Crawler Differences Search engines do not all support the same rules. Check the documentation for each crawler you need to control. ## Related documentation - [Google Search Central: Robots Meta Tag](https://developers.google.com/search/docs/crawling-indexing/robots-meta-tag) ## Related meta tags ### [author](https://zhead.dev/meta/author) name Names one author of the page. Add another author meta tag for each additional author. ``` ``` Names the author exactly as credited on the page. ### [charset](https://zhead.dev/meta/charset) charset Declares the character encoding used by the HTML document. In modern HTML, the value must be UTF-8. ``` ``` The required character encoding for modern HTML. ### [description](https://zhead.dev/meta/description) name Summarizes the page for directories and search engines. Google may use it as a search result snippet when it describes the page better than the visible content does. ``` ``` Specific details tell the reader what the recipe covers. ### [google](https://zhead.dev/meta/google) name Carries Google-specific page controls. Google currently documents nopagereadaloud for this metadata name. ``` ``` The documented Google-specific opt-out for page read-aloud services. ### [google-site-verification](https://zhead.dev/meta/google-site-verification) name Verifies ownership of a site in Google Search Console. Google provides the exact token to place on the site’s top-level page. ``` ``` Replace this placeholder with the exact token issued by Search Console.