HTML | <iframe> sandbox Attribute Last Updated : 06 May, 2025 Comments Improve Suggest changes Like Article Like Report The HTML <iframe> tag's sandbox attribute restricts the behavior of the embedded content for added security. It allows or disallows specific capabilities such as form submission and scripting within the iframe.When the sandbox attribute exists, it will: treat the content as being from a singular originIt blocks form submissionIt blocks script executionIt disables APIsIt also prevents links from targeting other browsing contextsIt stops the content from navigating its top-level browsing contextblock automatically triggered features (such as automatically playing a video or automatically focusing a form control)The value of the sandbox attribute will either be simply sandboxed (then all restrictions are applied) or a space-separated list of pre-defined values that will take away the actual restrictions.Syntax: <iframe sandbox="value">Attribute Values :AttributeDescriptionno-valuesApplies all restrictions, effectively disabling most capabilities of the embedded content.allow-formsRe-enables form submission within the iframe.allow-pointer-lockRe-enables pointer lock APIs within the iframe.allow-popupsRe-enables popups within the iframe.allow-same-originAllows the content of the iframe to be treated as being from the same origin as the parent page.allow-scriptsRe-enables scripts within the iframe.allow-top-navigationAllows the content of the iframe to navigate its top-level browsing context.Example: In this example we displays GeeksforGeeks heading, iframe with sandbox attribute, and source set to GeeksforGeeks IDE. Basic structure without sandbox attribute values. index.html <!DOCTYPE html> <html> <head> <title> HTML Iframe sandbox Attribute </title> </head> <body> <h1>GeeksforGeeks</h1> <h2>HTML IFrame sandbox Attribute</h2> <br /> <br /> <iframe id="GFGFrame" src="https://geeksforgeeks.org/community" width="400" height="200" sandbox > </iframe> </body> </html> Note: The HTML iframe syntax is correct, the https://geeksforgeeks.org website does not allow itself to be embedded in iframes on other domains. This is due to protective headers (X-Frame-Options, CSP) that prevent clickjacking and preserve content security. As a result, the iframe appears broken, even though the code itself is valid. You can check other website link to check the output.Supported Browsers:The browsers supported by HTML IFrame sandbox Attribute are listed below Google ChromeEdge FirefoxOperaSafari Comment More infoAdvertise with us Next Article HTML <iframe> scrolling Attribute S shubham_singh Follow Improve Article Tags : Web Technologies HTML HTML-Attributes Similar Reads HTML <iframe> align Attribute The HTML <iframe> align attribute is used to specify the alignment of the inline-frame according to the alternate element. Syntax<iframe align="left|right|middle|top|bottom">Attribute Valuesleft: It sets the alignment of an iframe to left.right: It sets the alignment of an iframe to righ 1 min read HTML | <Iframe> frameborder Attribute The HTML Iframe frameborder Attribute is used to specify whether or not to display the border around the content of an <Iframe> Element. Syntax: <iframe frameborder="1 | 0"> Attribute Values: 0: It has a Default value. It sets the border on one state. 1: It sets the border on-off state. 1 min read HTML | <iframe> height Attribute The HTML <iframe> height attribute is used to specify the height of the <iframe> in terms of pixels. Syntax: <iframe height="pixels"> Attribute Values: It contains single value pixel which specifies the height of the iframes in terms of pixels. Below example illustrates the use of 1 min read HTML <iframe> longdesc Attribute The HTML <iframe> element's longdesc attribute provides a URL that links to a detailed description of the iframe's content, mainly for accessibility purposes. However, this attribute is deprecated in HTML5, with ARIA attributes and other techniques recommended for describing content.Syntax< 2 min read HTML <iframe> marginheight Attribute The HTML <iframe> marginheight attribute specifies the vertical margin space, in pixels, between the iframe's content and its top and bottom borders. Syntax<iframe marginheight="pixels">Attribute Valuespixels: It contains the value i.e. pixel which specifies the top and bottom margin of 2 min read HTML <iframe> marginwidth Attribute The HTML <iframe> marginwidth attribute defines the horizontal margin space, in pixels, between the iframe's content and its left and right borders. Syntax<iframe marginwidth="pixels">Attribute Values:pixels: It contains the value i.e. pixel which specifies the right and left margin of t 2 min read HTML | <iframe> name Attribute The HTML iframe name Attribute is used to specify a reference for an <Iframe> Element. The name attribute is also used as a reference to the elements in a Javascript. Syntax: <iframe name="name">Attribute Values: name: It specify the name for the Iframe element.UsageThe name attribute as 1 min read HTML <iframe> referrerpolicy Attribute The HTML <iframe> referrerpolicy attribute is used to specify the reference information that will be sent when fetching the result. Syntax<iframe referrerpolicy="value">Attribute Values:no-referrer: It specifies that no reference information will be sent along with a request.no-referrer- 2 min read HTML | <iframe> sandbox Attribute The HTML <iframe> tag's sandbox attribute restricts the behavior of the embedded content for added security. It allows or disallows specific capabilities such as form submission and scripting within the iframe.When the sandbox attribute exists, it will: treat the content as being from a singul 2 min read HTML <iframe> scrolling Attribute The HTML <iframe> scrolling Attribute is used to specify whether the scrollbar will be displayed or not in the <Iframe> Element. Basically, the scrollbar is used when the content is larger than the Iframe Element. Note: This attribute has been DEPRECATED and is no longer recommended.Synt 1 min read Like