“Get Filesize Shortcode” is a simple shortcode to get filesize of a file( eg. PDF, JPG, PNG … ) with a human readable format, using the largest unit the bytes will fit into. Usage Put [filesize]http:yoursite.com/path/to/file.pdf[/filesize] anywhere in a post. Also you can place <?php echo do_shortcode('[filesize]http:yoursite.com/path/to/file.pdf[/filesize]'); ?> in your templates. Note File must be in your server With files larger than 2MB, it might return different number due to the spec of filesize function of PHP.