✏️ Freehand Drawing on PDF
Draw freehand with a mouse, trackpad, stylus, or finger. Pen, highlighter, and eraser modes with smooth curves and live preview — 100% in your browser.
Select or drop your PDF file here
or
document.pdf
Loading…
How to Draw Freehand on a PDF
Upload PDF
Drop your PDF into the box above or click to browse your files.
Draw Freely
Pick pen or highlighter, choose color and size, then draw with your mouse or finger.
Apply & Download
Click "Apply & Download" — your annotated PDF saves instantly.
Frequently Asked Questions
Yes. The tool uses modern Pointer Events, so it works with a mouse, trackpad, Wacom-style stylus, Apple Pencil, or your finger on a touchscreen. Pressure sensitivity isn't currently supported (all strokes are the same width).
Pen draws with a solid, opaque line — ideal for signatures, arrows, and notes. Highlighter automatically uses ~40% transparency and a thicker stroke, and is designed for marking up text like a real highlighter marker.
The eraser deletes strokes whose path comes within a small radius of your cursor. It works stroke-by-stroke, not pixel-by-pixel — so drag over any unwanted stroke to remove it completely. You can Undo eraser actions too.
Yes — click Undo (or press Ctrl+Z / Cmd+Z) to remove the last stroke, and Redo (or Ctrl+Shift+Z) to bring it back. The history is per-session and cleared when you upload a new PDF.
Yes. Strokes are embedded in the PDF as real vector paths (bezier curves), not images. They stay perfectly crisp at any zoom level and any print resolution.
No. Everything — preview rendering, stroke capture, and PDF embedding — happens in your browser using pdf.js and pdf-lib. Your file never leaves your device.