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How to Draw on a PDF — Freehand Drawing Tool Free Online | PDF AI Work Blog

PDF AI Work Team·July 29, 2026

Circle, underline, sketch, or scribble directly on your PDF with the Draw on PDF tool. Freehand drawing gives you the most natural way to mark up documents.

Use Cases

  • Circle important data points in reports
  • Underline key sentences with a wavy line
  • Sketch diagrams or flowcharts directly on the document
  • Cross out incorrect information
  • Sign with your finger or stylus on touch devices
  1. Open Edit PDF
  2. Upload your PDF
  3. Select the Draw/Freehand tool
  4. Choose color and line thickness
  5. Draw directly on the page
  6. Download the marked-up PDF

For shapes and structured markup: Add Shapes. For text annotations: Annotate PDF.

Free, client-side. Draw on your PDF now.

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