Flatten PDF
Flatten a PDF to lock its form fields, annotations and layers into the page itself. Nothing can be edited afterwards, which is what you want before sending a filled form to someone.
Common questions
Why flatten a form?
So the values cannot be changed after you submit it. The content becomes part of the page rather than an editable field.
Does flattening change appearance?
No. The document looks identical, it just cannot be edited.
Can I flatten only some pages?
Yes, the tool works on selected pages or the whole document.