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• 1. go to wordpress dashboard, then appearance, theme file editor then functions php then paste code in below

<?php 

/***

 * Convert Uploaded Images to WebP Format

 *

 * This snippet converts uploaded images (JPEG, PNG, GIF) to WebP format

 * automatically in WordPress.

 * 

 * ImageMagick or GD should be enable from server

 */

add_filter( ‘wp_handle_upload’, ‘devswizard_handle_upload_convert_to_webp’ );

function devswizard_handle_upload_convert_to_webp( $upload ) {

    if ( $upload[‘type’] == ‘image/jpeg’ || $upload[‘type’] == ‘image/png’ || $upload[‘type’] == ‘image/gif’ ) {

        $file_path = $upload[‘file’];

        // Check if ImageMagick or GD is available

        if ( extension_loaded( ‘imagick’ ) || extension_loaded( ‘gd’ ) ) {

            $image_editor = wp_get_image_editor( $file_path );

            if ( ! is_wp_error( $image_editor ) ) {

                $file_info = pathinfo( $file_path );

                $dirname   = $file_info[‘dirname’];

                $filename  = $file_info[‘filename’];

                // Create a new file path for the WebP image

                $new_file_path = $dirname . ‘/’ . $filename . ‘.webp’;

                // Attempt to save the image in WebP format

                $saved_image = $image_editor->save( $new_file_path, ‘image/webp’ );

                if ( ! is_wp_error( $saved_image ) && file_exists( $saved_image[‘path’] ) ) {

                    // Success: replace the uploaded image with the WebP image

                    $upload[‘file’] = $saved_image[‘path’];

                    $upload[‘url’]  = str_replace( basename( $upload[‘url’] ), basename( $saved_image[‘path’] ), $upload[‘url’] );

                    $upload[‘type’] = ‘image/webp’;

                    // Optionally remove the original image

                    @unlink( $file_path );

                }

            }

        }

    }

    return $upload;

}