Reduce image file sizes, improve performance and boost your SEO using the free WPMU DEV WordPress Smush API. The fastest, easiest and best performing image compression plugin for WordPress . So IN This Post I Teach You How To Turn Your Free WP Smush Plugin To Pro Version! 1/ Go to WP Repository and search for https://wordpress.org/plugins/wp-smushit/ 2/ Install WP Smush to Your WP Site 3/ Go to WP Smush plugin installation folder 4/ Go to “lib” folder 5/ Open file “class-wp-smush.php” for editing 6/ Search for “if ( empty( $api_key ) )” 7/ This function returns false, so change to true. Thats All!!! IF You Happy Please Like This Post! Will share more things here for BHW Members, need good response.