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Edit & Markup

Annotate PDF Online

Review documents the way you would on paper: highlight key passages, leave comments, point things out with arrows and sketch notes in the margin.

  • Runs in your browser — no upload
  • Free — no sign-up

How to use Annotate PDF

  1. 1Open the PDF you want to review.
  2. 2Choose Highlight, Comment, Draw, Arrow or a shape, and mark up the page.
  3. 3Download the annotated PDF to share it.

Why use Annotate PDF on PDF NOVA

Works in every reader

Comments are saved as standard PDF note annotations; highlights, drawings and shapes are drawn onto the page, so they look the same everywhere.

Files stay on your device

Processing happens in your browser. Your document is never uploaded to a server, so there is nothing to delete afterwards.

No sign-up, no watermark

Open the page and start working. Results are clean PDFs with no branding added.

Processing on your device

Annotate PDF processes your file in your browser on your device. The file is not uploaded for processing. Download the result to keep a permanent copy. Your active PDF is saved locally in this browser for recovery across refreshes. Close Document removes it; recovery expires after 24 hours and is cleaned up when PDF NOVA next opens. Unsaved changes are not restored.

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Frequently asked questions

Can other people see my comments?

Yes. Everything you add is saved in the downloaded PDF, so anyone who opens it sees your highlights, drawings and comments.