JavaScript  

Interactive PDF Annotation Tool with Movable Text Using HTML, Bootstrap, and JavaScript

In many business workflows, working with structured PDF forms — especially IPO forms, application documents, and reports — demands a system that can help place dynamic text elements accurately over predefined areas. This tool was built with that goal in mind.

✅ Key Features

  • PDF Rendering: Uses pdf.js to load and render any standard PDF on an HTML5 <canvas>.

  • Text Placement: Overlay text blocks on the canvas that are movable by drag, styled with custom font size and word spacing, and mapped to real PDF coordinates.

  • Dynamic Form Controls: A Bootstrap-powered form allows the user to:

    • Upload a PDF
    • Choose a symbol and form type
    • Select rows to activate
    • Edit data values inline
  • strong>Coordinate Tracking: Displays real-time X/Y coordinates during drag, synced with a table that can be exported as JSON.
  • Data Export: With a single click, extract all the selected annotations into a structured JSON for backend storage or integration.

🛠️ Tech Stack Used

  • Frontend: HTML, Bootstrap 5
  • PDF Rendering: Mozilla PDF.js
  • Interactivity & DOM Handling: jQuery
  • Responsive Design: Bootstrap Grid System
  • Data Structure: JavaScript Object with keys like x, y, key, fontSize, value, and wordSpacing

💡 Use Case Examples

  • IPO or Application Form Field Mapping
  • Designing Printed Blank Forms
  • PDF Certificate Generator Interface
  • Creating Coordinate Maps for Data Entry Software
  • Template-based Dynamic Document Builders

📝 How It Works

  1. User uploads a PDF file.

  2. Table lists all possible text placeholders.

  3. Check a row to activate and display it on the canvas.

  4. Drag to reposition; live coordinates and form updates follow.

  5. Adjust text attributes (size, spacing, value).

  6. Click "Final Submission" to export the structure as a JSON object.

📤 Future Enhancements (Ideas)

  • Add support for multiple PDF pages.

  • Save and reload configurations from local storage or server.

  • Integrate real-time preview rendering with actual PDF.

  • Include text rotation and alignment options.
    PDF Viewer

  • Add a rich text editor with color/font family selections.

This tool is a solid foundation for any PDF-related form processing application. With clean design principles and real-time interactivity, it makes data mapping a breeze for end-users and developers alike.

If you'd like, I can also help you turn this into a reusable component or deploy it online.

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