Annotate PDF

Add comments 💬, notes 📝, highlights, drawings
and more — all 100% in your browser.

100% Client-Side · No Upload · Free
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Annotate PDF — Free Online Tool

Highlight text, add sticky notes, draw freehand, and comment on PDFs. Great for reviewing documents, giving feedback, or studying materials.

How It Works

  1. Step 1. Upload your file using the drag-and-drop area above.
  2. Step 2. Adjust any settings, then start processing.
  3. Step 3. Download your result instantly — free, with no watermarks.

100% free · No watermarks · No sign-up required · Secure browser processing