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filter is not described

big_image_size_threshold filter-hook . WP 5.3.0

Filters the "BIG image" threshold value.

If the original image width or height is above the threshold, it will be scaled down. The threshold is used as max width and max height. The scaled down image will be used as the largest available size, including the _wp_attached_file post meta value.

Returning false from the filter callback will disable the scaling.


add_filter( 'big_image_size_threshold', 'filter_function_name_9243', 10, 4 );
function filter_function_name_9243( $threshold, $imagesize, $file, $attachment_id ){
	// filter...

	return $threshold;
The threshold value in pixels.
Default: 2560

Indexed array of the image width and height in pixels.

  • 0(int)
    The image width.

  • 1(int)
    The image height.
Full path to the uploaded image file.
Attachment post ID.


Since 5.3.0 Introduced.

Where the hook is called

wp-admin/includes/image.php 273
$threshold = (int) apply_filters( 'big_image_size_threshold', 2560, $imagesize, $file, $attachment_id );

Where in WP core the hook is used WordPress

Usage not found.