PDF Annotator
Annotate PDF documents for free. Highlight text, add sticky notes, draw markups, and collaborate on any PDF — browser-based and private.
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How to pdf annotator
Upload your PDF
Drag and drop the document you want to annotate.
Choose annotation tools
Select from highlighters, sticky notes, drawings, shapes, and stamps.
Mark up your document
Add annotations on any page. Use colors to organize your markups.
Download the annotated PDF
Save your annotated document — readable in any standard PDF viewer.
About PDF Annotator
PDF Shuttle's Annotator provides a complete set of markup tools for reviewing and commenting on PDF documents. Highlight important passages, add sticky notes with comments, draw freehand markups, insert text callouts, and stamp documents with approval marks.
Perfect for reviewing drafts, marking up contracts, providing feedback on reports, grading assignments, and collaborating on design documents. The annotator preserves the original document content while adding your annotations as a separate layer.
All annotation runs in your browser — your documents stay on your device. Export annotated PDFs that any standard PDF reader can display, or flatten annotations to make them permanent.
Why use PDF Annotator
- Highlight text in multiple colors
- Add sticky notes and text comments
- Freehand drawing and shape tools
- Strikethrough, underline, and text callout options
- Stamp tools for approval and review marks
- Color-coded annotations for organized markups
- Runs entirely in your browser — no uploads
- No watermarks, no signup, completely free
PDF Annotator - Frequently Asked Questions
Common questions about PDF Annotator.
Highlighter, sticky notes, text callouts, freehand drawing, shapes (rectangles, circles, arrows), strikethrough, underline, and stamp tools.
Yes. Multiple colors are available for highlights, drawings, and text annotations so you can color-code your markups.
Yes. Annotations are saved in a standard format that any major PDF reader (Adobe, Preview, Chrome, Firefox) can display.
Yes. Flattening makes annotations permanent and part of the page content. Use our Flatten PDF tool for this.
Yes. You can annotate any PDF, including scanned documents. Annotations are added as an overlay regardless of the underlying content.
Yes, as long as annotations are not flattened. Standard PDF readers can show, hide, or delete individual annotations.
No. Annotate documents of any length. Navigate between pages and add annotations wherever needed.
No. The annotator is completely free with no registration and no watermarks.
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