Key Features:

1.  PDF Upload and Display

• Upload any .pdf file from local storage.

• Renders all pages of the PDF using PDF.js with scalable canvas for high quality.

2.  Annotation Tools

• Select Tool: Move, resize, and modify existing annotations.

• Pencil Tool: Freehand drawing with customizable color.

• Text Tool: Add editable text anywhere on the PDF.

• Eraser Tool: Remove annotations by clicking over them.

3. Color Picker

• Real-time color selection for drawing and text tools.

  
  

4. Download Annotated PDF

• Combines original PDF and annotations into a new PDF.

• Uses PDF-lib to embed drawings/text as images onto the corresponding pages.

Libraries Used:

• PDF.js: Renders PDF pages into <canvas>.

• Fabric.js: Enables annotation layers and interaction with canvas objects.

• PDF-lib: Embeds annotations onto the final PDF output.