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Step 1 — Open the Viewer with your PDF
Open the Viewer and load a PDF — the toolbar across the top has every annotation tool you'll need, including the freehand drawing one we're about to use.
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Step 2 — Pick the Draw tool
Click "Draw" in the toolbar to switch to freehand drawing. A small panel appears next to the button so you can pick a stroke color and brush size before you start.
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Step 3 — Draw on the page
Click and drag on the page to draw freehand. PDFly captures every stroke as an editable annotation — you can hit Undo to remove the last one, switch colors mid-flow, or click an existing stroke later to delete it without touching the rest.
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Step 4 — Save the marked-up PDF
When you're done, save your file with "Download" to download a PDF that contains your drawings baked in. The strokes become permanent parts of the document so they show up wherever the file is opened.
How-to guide
How to draw on a PDF
Mark up a PDF with freehand strokes — circle a paragraph, sketch a quick diagram, or hand-sign a form. PDFly's viewer captures every stroke as an editable annotation, so you can adjust colors, brush size, and undo individual marks before saving.
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