About PDF Annotator & Markup Tool
Free online PDF annotator. Add sticky notes, callout text, highlights, freehand pencil markup, and shapes to PDF documents with instant high-res export.
Key Capabilities & Features
- Rich annotation toolkit: Text, Highlighter, Freehand Pen, and Shapes
- Custom color palette and stroke width adjustments
- Undo/redo support with per-page annotation layers
- 100% in-browser rendering with zero cloud uploads
How to Use PDF Annotator & Markup Tool
1
Upload Document
Select any PDF file.
2
Add Annotations
Use text, pen, or highlighter tools to mark up pages.
3
Save Annotated PDF
Download your finalized marked-up document.
Privacy & In-Browser Execution Guarantee
All annotations are layered locally in your browser.
Frequently Asked Questions
Are annotations compatible with Adobe Acrobat?
Yes! Annotations are saved as standard PDF specification objects visible in all PDF readers.
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