Form Logic Designer
Add simple logic to PDF forms
Drop your files here or
Accepted: .pdf · Files stay in your browser
Working…
Free · No signup · No watermarks · Files never leave your browser
How to use Form Logic Designer
- Upload your file using the drop zone above.
- Adjust any options for the form logic designer task.
- Click Process and download your result instantly.
Why use PDFzelo Form Logic Designer?
Add simple logic to PDF forms. PDFzelo processes everything locally in your browser — no uploads, no waiting rooms, no accounts. It works on Windows, Mac, Linux, Chromebook, Android and iPhone.
Frequently asked questions
What kind of logic?
Show/hide fields and basic calculations.