PDF Studio

Fill PDF Forms

Fill in PDF form fields and save the result. Free, private and processed in your browser — files are never uploaded.

How to use Fill PDF Forms in 4 steps

  1. Upload the PDF form.
  2. Type your answers into the fields listed on the page.
  3. Optionally lock the answers so they can't be changed.
  4. Click "Fill PDF Forms" and download the completed form.

When to use Fill PDF Forms

Completing a government form, filling in an application before submission, pre-populating fields in a template, or flattening a form for archiving.

Key features

  • Reads All Field Types — Detects text fields, checkboxes, radio buttons, and dropdown menus automatically.
  • Type Your Answers — Every field is listed with its own box, checkbox or drop-down to fill in.
  • Optional Lock — Flatten the answers into the page, or keep the form editable — your choice.
  • Reports Field Count — Shows exactly how many fields were found and filled.
  • Works on Any PDF Form — Compatible with forms created in Acrobat, LibreOffice, and most form builders.

Frequently asked questions

Which fields are supported?

Text boxes, checkboxes, radio buttons and drop-down lists.

What does "lock the answers" do?

It flattens the form: your answers become part of the page and the fields can no longer be edited. Leave it unticked to keep the form editable.

My PDF has no fields — what can I do?

Use Edit PDF to type text anywhere on the page instead.

Can I type in Urdu or Arabic?

PDF form fields can only show Latin characters with standard fonts. For other scripts, use Edit PDF.

Can I finish the form later?

Yes — leave "lock the answers" unticked. The downloaded form keeps its fields, so you can open it here again and carry on.

Works well with