How to Hide ‘Add to Cart’ Button in WooCommerce

woocommerce_is_purchasable

add_filter( 'woocommerce_is_purchasable', '__return_false');

Source:

The RIGHT Way to Hide

There are several ways to hide the Add to Cart button in WooCommerce. You can use PHP, JS or CSS. But even with PHP the right way is not as obvious as it seems.