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HTML <iframe> sandbox Attribute

❮ HTML <iframe> tag

Example

An <iframe> with extra restrictions:

<iframe src="demo_iframe_sandbox.htm" sandbox></iframe>
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More "Try it Yourself" examples below.


Definition and Usage

The sandbox attribute enables an extra set of restrictions for the content in the iframe.

When the sandbox attribute is present, and it will:

  • treat the content as being from a unique origin
  • block form submission
  • block script execution
  • disable APIs
  • prevent links from targeting other browsing contexts
  • prevent content from using plugins (through <embed>, <object>, <applet>, or other)
  • prevent the content to navigate its top-level browsing context
  • block automatically triggered features (such as automatically playing a video or automatically focusing a form control)

The value of the sandbox attribute can either be just sandbox (then all restrictions are applied), or a space-separated list of pre-defined values that will REMOVE the particular restrictions.


Browser Support

The numbers in the table specify the first browser version that fully supports the attribute.

Attribute
sandbox 4.0 10.0 17.0 5.0 15.0


Syntax

<iframe sandbox="value">

Attribute Values

Value Description
(no value) Applies all restrictions
allow-forms Allows form submission
allow-modals Allows to open modal windows
allow-orientation-lock Allows to lock the screen orientation
allow-pointer-lock Allows to use the Pointer Lock API
allow-popups Allows popups
allow-popups-to-escape-sandbox Allows popups to open new windows without inheriting the sandboxing
allow-presentation Allows to start a presentation session
allow-same-origin Allows the iframe content to be treated as being from the same origin
allow-scripts Allows to run scripts
allow-top-navigation Allows the iframe content to navigate its top-level browsing context
allow-top-navigation-by-user-activation Allows the iframe content to navigate its top-level browsing context, but only if initiated by user

More Examples

Example

An <iframe> sandbox allowing form submission:

<iframe src="demo_iframe_sandbox_form.htm" sandbox="allow-forms"></iframe>
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Example

An <iframe> sandbox allowing scripts:

<iframe src="demo_iframe_sandbox_origin.htm" sandbox="allow-scripts"></iframe>
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❮ HTML <iframe> tag