Are annotations editable later?

Yes, until you flatten the file.

Can multiple people annotate?

Not collaboratively yet — share the annotated file instead.

Yes, they follow the standard PDF annotation spec.

Edit PDF

Mark up PDFs with highlights, notes, and freehand drawing.

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Drop a PDF here or click to upload

Accepted: .pdf · Max 50 MB

Annotate PDF gives you tools to highlight passages, leave sticky notes, and draw on pages.

For reviewing contracts, marking up student papers, or collaborative feedback.

AI PDF tools

Once you've finished editing, let AI summarize, translate, or answer questions about the document.