Title: wp_is_client_side_media_processing_enabled
Published: August 20, 2026

---

# wp_is_client_side_media_processing_enabled(): bool

## In this article

 * [Description](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#description)
 * [Return](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#source)
 * [Hooks](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#hooks)
 * [Related](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#wp--skip-link--target)

Checks whether client-side media processing is enabled.

## 󠀁[Description](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#description)󠁿

Client-side media processing uses the browser’s capabilities to handle tasks like
image resizing and compression before uploading to the server.

## 󠀁[Return](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#return)󠁿

 bool Whether client-side media processing is enabled.

## 󠀁[Source](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#source)󠁿

    ```php
    function wp_is_client_side_media_processing_enabled(): bool {
    	// This is due to SharedArrayBuffer requiring a secure context.
    	$host    = strtolower( (string) strtok( $_SERVER['HTTP_HOST'] ?? '', ':' ) );
    	$enabled = ( is_ssl() || 'localhost' === $host || str_ends_with( $host, '.localhost' ) );

    	/**
    	 * Filters whether client-side media processing is enabled.
    	 *
    	 * @since 7.1.0
    	 *
    	 * @param bool $enabled Whether client-side media processing is enabled. Default true if the page is served in a secure context.
    	 */
    	return (bool) apply_filters( 'wp_client_side_media_processing_enabled', $enabled );
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/media.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.1/src/wp-includes/media.php#L6580)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/media.php#L6580-L6593)

## 󠀁[Hooks](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#hooks)󠁿

 [apply_filters( ‘wp_client_side_media_processing_enabled’, bool $enabled )](https://developer.wordpress.org/reference/hooks/wp_client_side_media_processing_enabled/)

Filters whether client-side media processing is enabled.

## 󠀁[Related](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#related)󠁿

| Uses | Description | 
| [is_ssl()](https://developer.wordpress.org/reference/functions/is_ssl/)`wp-includes/load.php` |

Determines if SSL is used.

  | 
| [apply_filters()](https://developer.wordpress.org/reference/functions/apply_filters/)`wp-includes/plugin.php` |

Calls the callback functions that have been added to a filter hook.

  |

| Used by | Description | 
| [wp_set_up_cross_origin_isolation()](https://developer.wordpress.org/reference/functions/wp_set_up_cross_origin_isolation/)`wp-includes/media.php` |

Enables cross-origin isolation in the block editor.

  | 
| [wp_set_client_side_media_processing_flag()](https://developer.wordpress.org/reference/functions/wp_set_client_side_media_processing_flag/)`wp-includes/media.php` |

Sets a global JS variable to indicate that client-side media processing is enabled.

  | 
| [WP_REST_Attachments_Controller::register_routes()](https://developer.wordpress.org/reference/classes/wp_rest_attachments_controller/register_routes/)`wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php` |

Registers the routes for attachments.

  | 
| [WP_REST_Attachments_Controller::create_item_permissions_check()](https://developer.wordpress.org/reference/classes/wp_rest_attachments_controller/create_item_permissions_check/)`wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php` |

Checks if a given request has access to create an attachment.

  | 
| [WP_REST_Server::get_index()](https://developer.wordpress.org/reference/classes/wp_rest_server/get_index/)`wp-includes/rest-api/class-wp-rest-server.php` |

Retrieves the site index.

  | 
| [wp_print_media_templates()](https://developer.wordpress.org/reference/functions/wp_print_media_templates/)`wp-includes/media-template.php` |

Prints the templates used in the media manager.

  |

[Show 1 more](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#)
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## 󠀁[Changelog](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/?output_format=md#changelog)󠁿

| Version | Description | 
| [7.1.0](https://developer.wordpress.org/reference/since/7.1.0/) | Introduced. |

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