The <input type="hidden"> defines a hidden input field. A hidden field lets web developers include data that cannot be seen or modified by users when a form is submitted. A hidden field often stores what database record that needs to be updated when the form is submitted.
Is input type hidden safe?
Since they are not rendered visible, hidden inputs are sometimes erroneously perceived as safe. But similar to session cookies, hidden form inputs store the software's state information client-side, instead of server-side. This makes it vulnerable.
How do I change the input type hidden in HTML?
The <input> tag with a type="hidden" attribute creates a hidden (invisible) input element.