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.
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 to annotate, on any device
Marking up a PDF shouldn't require Acrobat or an install. PainlessPDF lets you highlight and comment from your browser on any computer, with no sign-up. Your document uploads over a secure HTTPS connection, your marks are saved into the file, and it downloads with no watermark.
Frequently asked questions
Is annotating a PDF free?
Yes. You can highlight and annotate a PDF for free with no watermark and no account required.
What markup can I add?
You can highlight, underline, and strikethrough text, and add notes or comments anywhere on the page.
Will my annotations stay in the file?
Yes. When you download the document, your highlights and notes are saved into the PDF so they appear in any viewer.
Do I need to install anything?
No. Everything runs in the browser, so there's nothing to download. Open your PDF, mark it up, and save the annotated copy.
More free PDF tools
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Type, draw, or upload your signature and place it anywhere.
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Permanently remove sensitive text and images, not just cover them.
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Strip all highlights, comments, notes, and stamps at once.
