Annotate your PDF online

How to annotate a PDF

1. Open your PDF.
2. Choose a tool: Highlight, Draw, Shapes (rectangle, ellipse, line, arrow) or Note. Pick a color and thickness in the options bar.
3. Mark up the page. Drag to highlight or draw, or click to drop a note. Click any mark afterwards to move, resize, recolor or delete it.
4. Download your annotated PDF.

Mark up documents the way you would on paper

Students highlight key lines in notes and question papers, teachers circle mistakes and add comments to assignments, and teams point to changes in drafts and drawings. Highlights use a see-through multiply effect, so the text underneath stays readable, just like a real highlighter.

Sticky notes are shown as small yellow boxes on the page. They are drawn into the PDF, so they appear in every viewer. Undo and redo (Ctrl+Z and Ctrl+Y) cover every mark you add.

Good to know

• Annotations are drawn into the page content. They are not editable comment objects in other PDF programs.
• Highlighting is a drag-a-box tool. It does not select the text itself.
• Need to hide something instead? Use Redact. To type new text, see Edit PDF.

More free PDF tools

Need to do more than edit? PDFEditKaro has a free tool for most everyday PDF jobs. Every one runs in your browser, so your files stay private. See all tools.

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FAQ

Can I highlight text in a PDF?

Yes. Choose Highlight, then drag over the text. The highlight is see-through, so the text stays readable.

Can I change the color of a mark after drawing it?

Yes. Click the mark, then change the color or thickness in the options bar.

Are my annotations visible in other PDF viewers?

Yes. They are drawn into the page, so they show in any viewer. They will not be separate, editable comments though.

How do I delete an annotation?

Click it and press Delete, or use the red cross on its corner. You can also undo with Ctrl+Z.

Can I draw with my finger on a phone or tablet?

Yes. The Draw tool works with touch and with a stylus.