How do I annotate a PDF online for free?

Upload your PDF to A2ZDocs, select the annotation tool (highlight, underline, text note, or rectangle), and click or draw on the pages. Download the annotated PDF when done. No signup needed.

What annotation types does A2ZDocs support?

A2ZDocs supports highlight, underline, strikethrough, freehand drawing, text notes (sticky notes) and rectangle annotations.

Can I save annotations and re-edit them later?

Yes. Annotations are embedded in the downloaded PDF, so they are preserved and visible in any PDF reader. Re-upload to A2ZDocs to add more annotations.

Annotate PDF Online Free – Highlight, Comment & Draw

Drop PDF here or click to browse

Maximum 50 MB

Choose PDF