katanapdf

Annotate PDF Online Free

Freehand draw, highlight, add shapes and annotate your PDF directly in your browser. Use the pencil tool for handwritten notes, the highlighter for emphasis, or add shapes to mark up any document.

Go to Editor

No upload · No account · No watermark · 100% free

What you can do

  • Freehand pencil and highlighter tools
  • Add circles, squares, lines and arrows
  • Choose from multiple colours and stroke sizes
  • Add text boxes anywhere on the page
  • No upload — your file stays on your device

How it works

  1. 1
    Open your PDF

    Click 'Open PDF or Image' to load the document to annotate.

  2. 2
    Pick a tool

    Select Draw for freehand, or Shapes for circles, squares and arrows.

  3. 3
    Annotate

    Draw, highlight or add shapes anywhere on the page.

  4. 4
    Download

    Download your annotated PDF to your device.

Your PDF is processed entirely in your browser. No file is uploaded to any server. No account is required.

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