PDF Form Filler

Summary

Upload a PDF with AcroForm fields, fill every text box, checkbox, radio, and dropdown in your browser, then download the completed PDF.

How it works

1. pdf-lib reads the AcroForm dictionary embedded in the PDF, enumerates all fields by type, and renders browser inputs for each. On download, pdf-lib writes the entered values back into the field annotations and saves the PDF bytes as a Blob for download.

Use cases

• Filling government or tax forms without printing.
• Completing job applications or registration forms.
• Populating contract templates or agreements.
• Filling out medical or insurance paperwork.

Frequently Asked Questions