Add Comments to PDF
Add text comments, sticky notes, and annotations to PDF documents for review and collaboration. Perfect for document review, feedback, and collaborative editing workflows.
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Complete Guide: Add Comments to PDF
Everything you need to know about using this tool effectively
Add comments, notes, and annotations to any PDF document right in your browser. Insert sticky notes, text comments, highlights, and markup shapes to collaborate, review, and provide feedback on PDF files. Customize comment colors and icons, start reply threads, and download the annotated PDF ready for sharing.
This tool lets you add various types of comments and annotations to PDF documents. You can insert sticky notes at specific locations, add text annotations, highlight passages, draw attention with callouts, and use markup tools for collaborative review. All comments are saved directly into the PDF and visible in any PDF reader.
Document Review
Add feedback comments during collaborative document review processes
Proofreading
Mark corrections and suggestions directly on document pages
Student Feedback
Provide detailed annotations and comments on student papers and assignments
Design Critique
Add visual comments and markups on design proofs and mockups
Upload your PDF
Click the upload area or drag your PDF file onto it. The document loads in the browser editor with all pages visible.
Add your comments
Click any location on a page to place a sticky note, highlight text, or draw a markup shape. Customize colors and add reply threads.
Download annotated PDF
Click the download button to save the annotated PDF. All comments are embedded in standard format and visible in any PDF reader.
Use different colors to categorize comments by type or reviewer
Place sticky notes precisely on the content they reference
Keep comments concise and actionable for effective collaboration
Use highlight tool first then add a comment for precise feedback
Will comments be visible in all PDF readers?
Yes, comments are saved in standard PDF annotation format compatible with all readers
Can multiple people add comments?
Yes, different reviewers can add comments and reply to each other's annotations
Can I edit or delete comments after adding them?
Yes, you can modify, reply to, or remove any comment before downloading
Do comments increase the file size significantly?
Comments add minimal overhead, typically less than a few kilobytes per annotation