Highlight and add notes - no sign up

Annotate PDF

Highlight, underline, strikethrough, and add notes, then download. Free, in your browser, with no account.

Annotate your PDF now

Open the editor, mark up the document, and download the annotated file.

Open the editor - it's free

No sign up. No watermark. Works in your browser.

How to annotate a PDF online

1. Upload your PDF

Drag and drop the document you want to mark up. Files up to 1MB are supported on the free plan.

2. Highlight and annotate

Highlight, underline, or strikethrough text, and add notes or comments anywhere on the page to mark up the document.

3. Download

Save the annotated PDF instantly. Your marks travel with the file, with no account and no watermark.

Mark up a PDF the way you would on paper

Reviewing a contract, studying a paper, or giving feedback on a document is far easier when you can highlight the important parts and jot notes in the margin.

PainlessPDF lets you highlight, underline, strikethrough, and add comments directly on the page, so the document you send back shows exactly what you mean.

Highlight, underline, and strikethrough

Pull out key passages with a highlighter, mark deletions with strikethrough, and emphasise terms with an underline. Add notes to ask a question or explain a change without rewriting the document.

Free, in your browser, no software

There is nothing to install and no Acrobat licence required. Annotating a PDF works in any modern browser on Windows, Mac, Linux, and Chromebook, with no account and no watermark.

Frequently asked questions

Yes. You can highlight and annotate a PDF for free with no watermark and no account required.

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