HTML sandbox Attribute

HTML sandbox Attribute

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.

Applies to

The sandbox attribute can be used on the following element:

Element Attribute
<iframe> sandbox


An <iframe> with extra restrictions:

<iframe src="demo_iframe_sandbox.htm" sandbox></iframe>
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Browser Support

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

sandbox 4.0 10.0 17.0 5.0 15.0