For each uploaded image, WordPress lets you enter a caption to describe the file. This is very cool, but sometimes you don’t need captions at all. Here is how you can get rid of it.

Simply paste the following lines of code in your functions.php file, and you’re done!

 function caption_off() {     return true; }  add_filter( 'disable_captions', 'caption_off' ); 

Thanks to Wp Tricks for this nice hack!