Add highlights, comments, sticky notes, and markup annotations to PDFs
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Our Annotate PDF tool allows you to add highlights, comments, sticky notes, and markup annotations to PDF documents for review, collaboration, and feedback purposes. You can highlight important text with multiple colors, add detailed comments and feedback, place sticky notes for quick references, and use drawing tools including freehand drawing, underlines, strikethroughs, arrows, and shapes. All annotations are embedded in the PDF and can be viewed, edited, or removed in any PDF reader that supports annotations (such as Adobe Acrobat, Preview, or other PDF viewers). The tool is perfect for document reviews, proofreading, collaborative editing, study notes, or providing feedback on documents. All processing happens instantly in your browser, ensuring your documents remain private and secure. The tool is completely free with no watermarks, no file size limits, and no signup required. Perfect for teams, students, editors, or anyone who needs to mark up PDF documents.
Your privacy and security are our top priorities. All Annotate PDF processing is designed with security-first principles.
Add comments, highlights, and markup annotations to PDFs. Perfect for document reviews, proofreading, feedback, and collaborative editing.
Highlights
Mark important text with colored highlights. Choose from 5 colors.
Comments
Add detailed feedback and discussion points anywhere on the document.
Sticky Notes
Quick notes that can be expanded or collapsed.
Drawing Tools
Freehand drawing, underlines, strikethroughs, arrows, and shapes.
Document Review
Provide feedback on drafts
Proofreading
Mark corrections and edits
Study Notes
Highlight key information
Collaboration
Team document feedback
Pro Tip
All annotations are preserved in the PDF and can be viewed in any PDF reader that supports annotations (Adobe Acrobat, Preview, etc.).
Fast Processing
Convert files in seconds
100% Secure
All processing is client-side
High Quality
Maintains original quality
No Limits
Process unlimited files
Upload your PDF file, use the annotation tools to highlight text, add sticky notes, draw shapes, or add text comments. All annotations are saved in the PDF.
You can highlight text, add sticky notes, draw shapes (rectangles, circles, arrows), add text comments, and underline or strike through text.
Yes, annotating PDF files is completely free with no watermarks, no registration required, and no file size limits.
Yes, you can edit, move, or delete any annotation after adding it. Changes are saved when you download the annotated PDF.
Yes, annotations are embedded in the PDF and will be visible to anyone who opens the file in a PDF viewer that supports annotations.
Yes, you can add unlimited annotations including highlights, notes, shapes, and comments throughout the document.
You can delete individual annotations or start over with a fresh upload of the original file to remove all annotations.