How to Annotate a PDF Online — Add Notes and Comments Free

Annotating a PDF online is the fastest way to collaborate on a document without converting it or sending it back and forth. PDF me provides a free in-browser annotation tool that lets you add sticky notes, comments, and threaded replies to any PDF — no account or software needed.

What is the PDF Annotate tool?

The Annotate tool in PDF me lets you place sticky notes and inline comments on any page of a PDF document. Comments support threaded replies, making it easy to discuss specific content with colleagues. All annotations are embedded in the exported file so they travel with the document.

Why annotate PDFs with PDF me?

• No account required: Open the tool and start annotating immediately — no sign-up, no email verification.
• Threaded replies: Respond to comments in context so discussions stay organised and easy to follow.
• Browser-based: Works on any device with a modern browser — desktop, tablet, or mobile.
• Embedded output: Annotations are saved inside the PDF file, not in a separate database.

Common use cases

PDF annotation is widely used in academic, legal, and business contexts wherever feedback needs to be attached directly to a document rather than sent separately.

• Reviewing and marking up research papers or reports
• Providing editorial feedback on drafts and manuscripts
• Leaving reviewer comments on legal contracts
• Collaborating on design briefs and specifications

How to annotate a PDF with PDF me

1. Open PDF me and select the Annotate PDF tool.
2. Upload your PDF by clicking the upload button or dragging the file into the tool.
3. Click anywhere on a page to add a sticky note or select text to add an inline comment.
4. Download the annotated PDF with all notes embedded.