URL: createObjectURL() static method

Note: This feature is available in Web Workers, except for Service Workers.

The createObjectURL() static method of the URL interface creates a string containing a blob URL pointing to the object given in the parameter.

For more information, see blob URLs.

To release an object URL, call revokeObjectURL().

Note: This feature is not available in Service Workers due to its potential to create memory leaks.

Syntax

URL.createObjectURL(object)

Parameters

object: A Blob (such as a File) or MediaSource object to create an object URL for.

Return value

A string containing an object URL that can be used to reference the contents of the specified source object.

Examples

See Using object URLs to display images.

Specifications

Specification
File API # dfn-createObjectURL

Browser compatibility

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This page was last modified on Jul 23, 2025 by MDN contributors.

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URL: https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL_static

⇱ URL: createObjectURL() static method - Web APIs | MDN