Drawing on a PDF is useful for marking up documents, creating freehand annotations, circling important content, or sketching feedback directly on a page.
Go to pdfeditor.onl/pdf-studio and upload your PDF.
Click the Pen icon in the toolbar. Choose a color and stroke thickness. Then draw freely on the PDF page using your mouse, trackpad, or finger on a touchscreen.
Tip: On a tablet with a stylus, the pen tool produces natural-looking freehand annotations. Great for markup reviews and feedback.
Draw straight lines, circles, and arrows by making controlled strokes. For an arrow, draw a straight line and add a small V-tip at the end.
Click Download PDF. All drawn annotations are permanently flattened into the page content.
Yes. The pen tool is fully compatible with Apple Pencil on iPad, Samsung S Pen, and other active stylus devices.
Use the Undo button immediately after a mistake. Once downloaded, annotations cannot be removed without specialist software.
Yes — the Pen tool is completely free in PDF Studio.