In HTML, link types indicate the relationship between two documents, in which one links to the other using an <a>
, <area>
, <form>
, or <link>
element.
Link Type | Description | Allowed in these elements | Not allowed in these elements |
---|---|---|---|
alternate |
|
<a> , <area> , <link> |
<form> |
archives |
Defines a hyperlink to a document that contains an archive link to this one. For example, a blog entry could link to a monthly index page this way. Note: Although recognized, the singular archive is incorrect and must be avoided. |
<a> , <area> , <link> |
<form> |
author |
Defines a hyperlink to a page describing the author or providing a way to contact the author. Note: This may be a mailto: hyperlink, but this is not recommended on public pages as robot harvesters will quickly lead to a lot of spam sent to the address. In that case, it is better to lead to a page containing a contact form.Although recognized, the rev attribute on <a> , <area> or<link> elements with a link type of made is incorrect and should be replaced by the rel attribute with this link type. |
<a> , <area> , <link> |
<form> |
bookmark |
Indicates that the hyperlink is a permalink for the nearest ancestor <article> element. If none, it is a permalink for the section that the element is most closely associated to.This allows for bookmarking a single article in a page containing multiple articles, such as on a monthly summary blog page, or a blog aggregator. |
<a> , <area> |
<link> , <form> |
canonical |
From Wikipedia, the free encyclopedia: Canonical_link_element A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical" or "preferred" version of a web page as part of search engine optimization. |
<link> |
<a> , <area> , <form> |
dns-prefetch |
Hints to the browser that a resource is needed, allowing the browser to do a DNS lookup and protocol handshaking before a user clicks the link. | <link> |
<a> , <area> , <form> |
external |
Indicates that the hyperlink leads to a resource outside the site of the current page; that is, following the link will make the user leave the site. | <a> , <area> , <form> |
<link> |
first |
Indicates that the hyperlink leads to the first resource of the sequence the current page is in. Note: Other link types related to linking resources in the same sequence are last , prev , next .Although recognized, the synonyms begin and start are incorrect and must be avoided. |
<a> , <area> , <link> |
<form> |
help |
<a> , <area> , <form> , <link> |
None. | |
icon |
Defines a resource for representing the page in the user interface, usually an icon (auditory or visual). In the browser, it is usually referred to as the favicon. If there are multiple <link rel="icon"> s, the browser uses their media , type , and sizes attributes to select the most appropriate icon. If several icons are equally appropriate, the last one is used. If the most appropriate icon is later found to be inappropriate, for example because it uses an unsupported format, the browser proceeds to the next-most appropriate, and so on.Note: Apple's iOS does not use this link type, nor the sizes attribute, like others mobile browsers do, to select a webpage icon for Web Clip or a start-up placeholder. Instead it uses the non-standard apple-touch-icon and apple-touch-startup-image respectively.The shortcut link type is often seen before icon , but this link type is non-conforming, ignored and web authors must not use it anymore. |
<link> |
<a> , <area> , <form> |
import |
HTML Imports | <link> |
<a> , <area> , <form> |
index Obsolete since HTML5 |
Indicates that the page is part of a hierarchical structure and that the hyperlink leads to the top level resource of that structure. If one or several up link types are also present, the number of these up indicates the depth of the current page in the hierarchy. |
<a> , <area> , <link> |
<form> |
last |
Indicates that the hyperlink leads to the last resource of the sequence the current page is in. Note: Other link types related to linking resources in the same sequence are first , prev , next .Although recognized, the synonym end is incorrect and must be avoided. |
<a> , <area> , <link> |
<form> |
license |
Indicates that the hyperlink leads to a document describing the licensing information. If not inside the <head> element, the standard doesn't distinguish between a hyperlink applying to a specific part of the document or to the document as a whole. Only the data on the page can indicate this.Note: Although recognized, the synonym copyright is incorrect and must be avoided. |
<a> , <area> , <form> , <link> |
None. |
manifest |
Indicates that the linked file is a Web App Manifest. | <link> |
<a> , <area> , <form> |
modulepreload |
Initiates early (and high-priority) loading of module scripts. | <link> |
<a> , <area> , <form> |
next |
Indicates that the hyperlink leads to the next resource of the sequence the current page is in. Note: Other link types related to linking resources in the same sequence are first , prev , last . |
<a> , <area> , <form> , <link> |
None. |
nofollow |
Indicates that the linked document is not endorsed by the author of this one, for example if it has no control over it, if it is a bad example or if there is commercial relationship between the two (sold link). This link type may be used by some search engines that use popularity ranking techniques. | <a> , <area> , <form> |
<link> |
noopener |
Instructs the browser to open the link without granting the new browsing context access to the document that opened it — by not setting the Note that when |
<a> , <area> , <form> |
<link> |
noreferrer |
Prevents the browser, when navigating to another page, to send this page address, or any other value, as referrer via the |
<a> , <area> , <form> |
<link> |
opener |
Reverts implicit |
<a> , <area> , <form> |
<link> |
pingback |
Defines an external resource URI to call if one wishes to make a comment or a citation about the webpage. The protocol used to make such a call is defined in the Pingback 1.0 specification. Note: if the X-Pingback: HTTP header is also present, it supersedes the <link> element with this link type. |
<link> |
<a> , <area> , <form> |
preconnect |
Provides a hint to the browser suggesting that it open a connection to the linked web site in advance, without disclosing any private information or downloading any content, so that when the link is followed the linked content can be fetched more quickly. | <link> |
<a> , <area> , <form> |
prefetch |
Suggests that the browser fetch the linked resource in advance, as it is likely to be requested by the user. Starting with Firefox 44, the value of the crossorigin attribute is taken into consideration, making it possible to make anonymous prefetches.Note: The Link Prefetch FAQ has details on which links can be prefetched and on alternative methods. |
<link> |
<a> , <area> , <form> |
preload |
Tells the browser to download a resource because this resource will be needed later during the current navigation. See Preloading content with rel="preload" for more details. | <link> |
<a> , <area> , <form> |
prerender |
Suggests that the browser fetch the linked resource in advance, and that it also render the prefetched content offscreen so it can be quickly presented to the user once needed. | <link> |
<a> , <area> , <form> |
prev |
Indicates that the hyperlink leads to the preceding resource of the sequence the current page is in. Note: You can also use the next keyword to specify a link to the next page in the sequence.Although recognized, the synonym previous is incorrect and must be avoided. |
<a> , <area> , <link> , <form> |
None. |
search |
Indicates that the hyperlink references a document whose interface is specially designed for searching in this document, or site, and its resources. If the type attribute is set to application/opensearchdescription+xml the resource is an OpenSearch plugin that can be easily added to the interface of some browsers like Firefox or Internet Explorer. |
<a> , <area> , <link> , <form> |
None. |
shortlink |
shortlink SpecificationFrom Wikipedia, the free encyclopedia: URL shortening Some websites create short links to make sharing links via instant messaging easier. |
<link> |
??? |
sidebar Obsolete since Gecko 63 |
Indicates that the hyperlink leads to a resource that would be better suited for a secondary browsing context, like a sidebar. Browsers, that don't have such a context will ignore this keyword. While once part of the HTML specification, this has been removed from the spec and is only implemented by versions of Firefox prior to Firefox 63. |
<a> , <area> , <link> |
<form> |
stylesheet |
Defines an external resource to be used as a stylesheet. If the type is not set, the browser should assume it is a text/css stylesheet until further inspection.If used in combination with the alternate keyword, it defines an alternative style sheet; in that case the title attribute must be present and not be the empty string. |
<link> |
<a> , <area> , <form> |
tag |
Indicates that the hyperlink refers to a document describing a tag that applies to this document. Note: This link type should not be set on links to a member of a tag cloud as these do not apply to a single document but to a set of pages. |
<a> , <area> |
<link> , <form> |
up |
Indicates that the page is part of a hierarchical structure and that the hyperlink leads to the higher level resource of that structure. The number of up link types indicates the depth difference between the current page and the linked resource. |
<a> , <area> , <link> |
<form> |
Specifications
Specification | Status | Comment |
---|---|---|
Preload The definition of 'preload' in that specification. |
Candidate Recommendation | Added preload . |
Resource Hints The definition of 'preconnect' in that specification. |
Working Draft | Added dns-prefetch , preconnect , and prerender values. |
HTML Living Standard The definition of 'link types' in that specification. |
Living Standard | Added opener and made noopener the default behavior for target="_blank" links. |
HTML5 The definition of 'link types' in that specification. |
Recommendation | Added tag , search , prefetch , noreferrer , nofollow , icon , and author .Renamed copyright to license .Removed start , chapter , section , subsection , and appendix |
HTML 4.01 Specification The definition of 'link types' in that specification. |
Recommendation | Added alternate , stylesheet , start , chapter , section , subsection , appendix , and bookmark .Renamed previous to prev .Removed top , and search . |
Unknown The definition of '<link>' in that specification. |
Obsolete | Added top , contents , index , glossary , copyright , next , previous , help , and search . |
RFC 1866: HTML 2.0 | Obsolete | Initial definition. |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
rel | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support Yes | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Alternative stylesheets. | Chrome No support 1 — 48 | Edge ? | Firefox Full support 3 | IE Full support 8 | Opera Full support Yes | Safari ? | WebView Android ? | Chrome Android ? | Firefox Android Full support 4 | Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
dns-prefetch | Chrome Full support 46 | Edge Full support ≤79 | Firefox Full support 3 | IE ? | Opera Full support 33 | Safari ? | WebView Android Full support 46 | Chrome Android Full support Yes | Firefox Android Full support 4 | Opera Android ? | Safari iOS ? | Samsung Internet Android Full support Yes |
icon | Chrome
Full support
4
| Edge
Full support
12
| Firefox Full support 2 | IE Full support 11 | Opera
Full support
9
| Safari
Full support
3.1
| WebView Android Full support 38 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android No support No | Safari iOS
No support
No
| Samsung Internet Android Full support 4.0 |
manifest | Chrome No support No | Edge No support No | Firefox ? | IE ? | Opera No support No | Safari ? | WebView Android Full support 39 | Chrome Android Full support 39 | Firefox Android ? | Opera Android ? | Safari iOS ? | Samsung Internet Android Full support 4.0 |
modulepreload | Chrome Full support 66 | Edge Full support ≤79 | Firefox ? | IE ? | Opera Full support 53 | Safari ? | WebView Android Full support 66 | Chrome Android Full support 66 | Firefox Android ? | Opera Android Full support 47 | Safari iOS ? | Samsung Internet Android Full support 9.0 |
preconnect | Chrome Full support 46 | Edge Full support 79 | Firefox
Full support
39
| IE No support No | Opera Full support 33 | Safari Full support 11.1 | WebView Android Full support 46 | Chrome Android Full support 46 | Firefox Android
Full support
39
| Opera Android Full support 33 | Safari iOS Full support 11.3 | Samsung Internet Android Full support 4.0 |
prefetch | Chrome Full support 8 | Edge Full support 12 | Firefox Full support 2 | IE Full support 11 | Opera Full support 15 | Safari No support No | WebView Android Full support 4.4 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 1.5 |
preload | Chrome Full support 50 | Edge Full support ≤79 | Firefox
No support
56 — 57
| IE ? | Opera Full support 37 | Safari ? | WebView Android Full support 50 | Chrome Android Full support 50 | Firefox Android
No support
56 — 57
| Opera Android ? | Safari iOS ? | Samsung Internet Android Full support 5.0 |
prerender | Chrome Full support 13 | Edge Full support 79 | Firefox No support No | IE Full support 11 | Opera Full support 15 | Safari No support No | WebView Android Full support 4.4 | Chrome Android Full support 18 | Firefox Android No support No | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 1.5 |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- Non-standard. Expect poor cross-browser support.
- Non-standard. Expect poor cross-browser support.
- See implementation notes.
- See implementation notes.