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Annotate PDF Online — Free and Private

Highlight a passage or drop a text note on the page, then save the marked-up copy. Add your one PDF and get a PDF with your highlights, comments and markup saved in it — no upload, no signup, no watermark.

What you can do with Annotate PDF

Highlight any area of the page

Add a text note anywhere on the page

Both are saved as real PDF annotations other readers can list

How to annotate pdf in 3 steps

  1. Add your PDF

    Drop in the document you want to mark up.

  2. Annotate the page

    Highlight what matters, or put a note where it belongs.

  3. Download the annotated PDF

    Save the marked-up copy straight to your device.

Annotate PDF is for the last read before a document goes out: highlight the sentences that matter, leave a comment in the margin, and mark what needs a second look. You mark up the pages you uploaded, and the file is read locally in your browser — so client drafts and internal reports stay on your machine.

No upload

Your one PDF are read locally with JavaScript and WebAssembly — for this tool, nothing is sent to a server.

No signup

No account, no email, no credit card, no trial to remember.

No watermark

What you download is the real file — clean, unmarked and print-ready.

Annotate PDF FAQ

Does annotating a PDF change my original file?

No. Your original stays on your device untouched, and you download a new copy with the annotations in it.

What can I add to the page?

A highlight over an area, or a text note at a point you choose. Each one is written into the file as a real PDF annotation, so other readers list it as a comment.

What do I get back after using Annotate PDF?

You get a PDF with your highlights, comments and markup saved in it.

Do I need an account to use it?

No account, no email and no credit card. Open the page, add your file and download the result.

Is this safe for confidential documents?

Yes. The work happens locally, so no copy of your document is stored anywhere. There is no upload step to leak and no server-side queue to wait in.

Does it work on a phone, and can I use it offline?

Yes. The page works in any modern browser on desktop, tablet or phone, and once it has loaded it keeps working with no connection.

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