Build Fillable PDF Forms Online

Upload any PDF and turn it into an interactive form. Drag and drop text fields, checkboxes, signatures, dates, dropdowns and more onto your document. Use AI-assisted detection to speed up the process.

No complicated setup. Upload your existing PDF and start in minutes.

Start With Your Existing PDF

You do not need to recreate your document in a form builder. Upload the PDF you already have — whether it is a contract, application, intake form or questionnaire — and add interactive fields on top of it.

Drag and Drop Fields

Pick a field type from the palette and drag it onto the document. Position it exactly where you want it, resize it to fit, and move it again if needed. Every field can be adjusted at any time before you send the form.

Available Field Types

  • Single-line text fields
  • Multiline text fields for longer responses
  • Signature fields (drawn or typed)
  • Initials fields
  • Date fields
  • Checkboxes
  • Radio buttons
  • Dropdown menus
  • Highlight fields
  • Image upload fields

AI-Assisted Field Detection

FillPen can scan your PDF and suggest where fields are likely needed — names, dates, signatures, initials and other common form elements. Review the suggestions, then accept, move, resize or remove them before sending.

Save as a Template

Once you have built a form, save it as a reusable template. The next time you need to send the same form, create a new PIN from the template without rebuilding the fields.

Ready to get started?

Upload your PDF, add fields, and share it in minutes.