Freehand Drawing / Pencil - Free Online Browser Tool

Draw custom freehand shapes and marks on PDF pages.

Some things need to be drawn rather than typed — a rough diagram, a circled paragraph, a signature, a scrawl of notes in the margin. This tool captures freehand strokes with your mouse or finger and bakes them into the page as vector ink.

This freehand drawing / pencil utility runs completely inside your web browser. Your document is opened locally and processed on your own device using JavaScript and WebAssembly, so your file is never uploaded to any server. There is no signup, no watermark and no limit on how many documents you can handle.

  • 100% client-side - files never leave your device
  • Instant processing, no upload wait
  • Works on desktop, tablet and mobile
  • Free forever, no account required

Common next steps: Shapes & Redaction Boxes, Sign PDF.

How to Use the Freehand Drawing / Pencil Tool

Four steps, and the whole thing runs locally on your own device.

  1. Load the PDF

    Drop in the document you want to draw on.

  2. Pick your ink

    Choose the stroke colour and width. A fine dark line suits markup; a broad coloured stroke suits circling something important.

  3. Draw on the page

    Use your mouse, trackpad or finger to draw directly on the page preview. Each stroke can be undone before you commit.

  4. Save the drawing

    Your strokes are flattened into the page content as vector paths — sharp at any zoom, and no annotation toolbar required to view them.

Frequently Asked Questions

Are the drawings real annotations or part of the page?

They are flattened into the page as vector ink, so they display identically everywhere with no need to enable annotation viewing.

Will they look smooth or pixelated when zoomed?

Smooth. Strokes are stored as vector paths, so they scale cleanly to any zoom level or print resolution.

Can I undo a mistake?

Yes, strokes can be removed before saving. Once saved into a page, undo is no longer available — so review the drawing before downloading.

Can I draw on a phone?

Yes. Finger drawing works through touch events, though a stylus gives noticeably better control for precise work.

Is this different from the Shapes tool?

This one captures freehand strokes as you draw them. The Shapes tool offers precise geometric rectangles, callouts and borders with fixed dimensions.