Annotate PDF Documents Free Online - No Registration Required
Add highlights, underlines, text notes, and drawings to your PDF documents with our free online annotation tool. Mark up documents for review, study, or collaboration - completely free without registration.
Why Annotate PDFs?
PDF annotation is essential for document review, studying, collaboration, and feedback. Mark important passages, add comments, highlight key information, and draw attention to specific areas without modifying the original document content.
How Our Free Annotator Works
Upload your PDF and use the toolbar to select annotation tools. Highlight text in various colors, underline or strikethrough text, add text notes and comments, draw freehand shapes, and more. All annotations are embedded directly into the PDF.
Annotation Tools
- Highlight: Mark text with customizable highlight colors
- Underline/Strikethrough: Emphasize or cross out text
- Text Notes: Add comments and notes anywhere
- Freehand Drawing: Draw shapes and marks freely
- Color Options: Choose from multiple colors for each tool
100% Free, Secure, and Private
Our annotation tool is completely free with no watermarks, no registration, and no limits. All processing happens in your browser - your documents never leave your device.
Perfect for Review and Study
Whether reviewing documents, studying materials, providing feedback, or marking up drafts, our free tool handles it all. Start annotating your PDFs today - completely free, no registration needed!