This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.


The URL.revokeObjectURL() static method releases an existing object URL which was previously created by calling URL.createObjectURL().  Call this method when you've finished using an object URL to let the browser know not to keep the reference to the file any longer.

You can call revokeObjectURL() any time after sourceopen is handled. This is because createObjectURL() is merely a means of connecting a media element's src attribute with a MediaSource instance. Calling revokeOjbectURL() leaves the underlying objects in place and allows the platform to handle garbage collection at an appropriate time.

Note: This feature is available in Web Workers.


is a DOMString representing the object URL that was created by calling URL.createObjectURL().


See Using object URLs to display images.


Specification Status Comment
File API
The definition of 'URL' in that specification.
Working Draft Initial definition

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 8.0[1] (Yes) 4.0 (2.0) 10.0 15.0 6.0[1]
Feature Android Edge Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support (Yes)[1] (Yes) 14.0 (14.0) (Yes) 15.0 6.0[1]

[1] Implemented with URL prefixed as webkitURL.

See also

Document Tags and Contributors

 Last updated by: erikadoyle,