BunchTool's PDF Annotator gives you a complete, high-fidelity toolbox to mark up, annotate, write notes, draw freehand diagrams, and highlight texts directly on your PDF pages online. Running entirely client-side, the tool renders vector shapes and graphics without server uploads to respect document confidentiality. Switch between highlighter, pen, box outline, or text note modes to customize documents instantly offline before downloading a fully vector-committed PDF.
Drag and drop your PDF document onto the workspace, or browse your device to load it locally.
Select Pen, Highlight, Shape, or Text mode. Adjust colors, opacity, and sizes. Annotate directly on the rendering page.
Click Download Annotated PDF. The compiler maps canvas overlays back to document parameters and saves automatically.
All document drawings are generated client-side inside your browser sandbox. No parameters are ever logged or uploaded.
Combine highlights, pen scribbles, rectangles, and comments. Supports multiple adjustments for exact layouts.
Works 100% offline. Commits annotations as official vector shapes directly into the output document format.