Can I add fillable fields to a PDF I already have?
Upload the PDF and its pages appear in the editor; pick a field type
from the toolbar and click on the page to place it, then drag or
resize it as needed. If the PDF already has form fields, they're
detected and loaded so you can move, edit, or delete them alongside
the new ones.
Can I make a form from scratch without an existing PDF?
Click Create Blank PDF and choose Letter, A4, A5, Legal, Tabloid,
A3, or custom dimensions in points. Use Add Page for multi-page
forms.
Which field types are available?
Text (single line, multi-line, or divided into comb boxes),
checkbox, radio button groups, dropdown, list box, push button,
signature, date, image, and barcode. Each field has a properties
panel for name, default value, font size, text color, alignment,
tooltip, and required or read-only flags. Signature fields are
standard AcroForm signature fields, which only appear in viewers
that support signing.
How do radio buttons get grouped so only one can be selected?
Every radio field has a group name, RadioGroup1 by default. Fields
that share the same group name become one mutually exclusive set, so
give each question its own group name and set a distinct export
value on each option.
Can a button show or hide another field, or reset the form?
Button actions include Reset Form, Print Form, Open URL, Run
JavaScript, and Show/Hide Field, which targets another field and can
show, hide, or toggle it. They're stored as standard PDF actions, so
they run in Acrobat and other viewers that support form scripting.
How does the date field work?
It's a text field with a date format attached, mm/dd/yyyy by default
or a custom pattern such as dd/mm/yyyy. Viewers that support
AcroForm JavaScript validate the typed value and format it; simpler
viewers treat it as ordinary text.
Are barcodes and images real form fields?
A barcode (QR Code, Code 128, Code 39, EAN-13, UPC-A, DataMatrix, or
PDF417) is generated from the value you enter and drawn onto the
page as a fixed image, so the person filling the form can't change
it. The image field is a button that lets the user pick a picture
from their computer, which works in Acrobat and other viewers that
support image import.
Is the form or the uploaded PDF stored on a server?
No. The editor runs in your browser, the fields are written into the
PDF with pdf-lib on your device, and Download PDF Form saves the
result locally under the original filename. You can test the result
in
PDF Form Filler.