LibreOffice Writer can create fillable PDFs from scratch with built-in tools. Start by opening a blank document and adding form fields using the Form Controls and Form Design toolbars. To export ...

That includes the ability to create PDFs from one of hundreds of built-in templates that allow you to create fillable PDF forms with check boxes, radio buttons, text fields, list boxes, and more.

This detailed guide covers how to edit PDFs on iPhone and iPad in iOS 15 with the native Files app, no third-party app needed.