Annotate PDF is a review workspace. Highlight passages, strike through text you want removed, add text notes, and draw arrows or circles to point at details. Teachers marking up handouts, students studying papers and colleagues reviewing drafts all use the same simple set of tools. The marked-up file is produced on your device, so private drafts stay private.

Step by step

1Choose a PDF and let the editor open on page one.
2Use Text, Draw, Highlight, or native-text selection to add review markup.
3Review the continuous document and download the annotated result.

Common uses

Highlight important passages
Draw or write review notes
Mark text for removal with strike marks

Need more help with PDFs? Browse our step-by-step PDF guides or read practical articles on the PDF Eye blog.

Details and common questions

Which files are supported?

One PDF.

What result will I receive?

One annotated PDF.

What should I know before using it?

Native text selection requires embedded searchable text.
Freehand, highlight, and eraser layers remain page-local.
Annotations are visual editor overlays rather than a collaborative comment system.

Can I copy text from the PDF?

Yes, when the PDF contains embedded searchable text. Scanned pages require OCR, which is not currently included.

Do repeated highlights become darker?

The editor consolidates highlights into a uniform-opacity layer to avoid unwanted stacking.

How do I highlight and comment on a PDF online?

Open the PDF, choose Highlight for passages, Text for notes and Draw for freehand marks, then download the annotated copy.

Can other people see and reply to my annotations?

The annotations are saved as visible marks in the PDF. They are not a shared comment thread, so replies happen outside the file.