Can I use a stylus or Apple Pencil with the PDF Pen Tool?

Yes. KissThePDF supports touch and pointer events, providing responsive inking on iPad, tablet devices, touch-enabled laptops, and graphic drawing tablets.

How do I erase or undo a pen stroke?

You can click the Undo button in the top toolbar to remove the latest stroke, or use the Eraser tool to click and remove individual drawn strokes.

Can I use the pen tool to sign PDF documents?

Yes. You can write your signature directly on contracts or authorization forms with the pen tool, or use our dedicated Sign PDF tool for signature management.

Does drawing with the pen tool reduce PDF sharpness or print quality?

No. Drawn strokes are embedded as crisp vector paths within the PDF, maintaining maximum resolution at any zoom level or print scale.

Are my drawn notes or files transmitted to any server?

No. All drawing computations and PDF compilation run entirely in your local browser sandbox.

Docs

100% Client-Side Engine

GitHub

PDF Pen Tool: Draw and Write on PDF Online

Step-by-step guide: How to Use a Pen Tool on a PDF (Smooth Handwriting)