Auto-generate a unique random string and set it to post_name. Customization with hooks Use of filter hooks is at your own risk. You can change post_type to be applied by an array. Deafult is ‘post’ only. add_filter( 'random_post_name_post_types', 'hoge' ); function hoge(){ return ['post', 'page']; } You can change the number of characters in the post_name. Deafult is 10. add_filter( 'random_post_name_digits', 'hoge' ); function hoge(){ return 20; } You can change the variation of characters. Deafult is ‘0123456789abcdefghijklmnopqrstuvwxyz’. Do not include multibyte chars. add_filter( 'random_post_name_choices', 'hoge' ); function hoge(){ return '0123456789abcdefghijkmnpqrstuvwxyz_-'; } Precautions Too few characters and too few character variations can cause unexpected problems.