QuickSign Chrome Extension

QuickSign is a Chrome extension that adds PNG signature images to PDF documents. It is specifically designed for signing QuickBooks Online PDF checks directly in your browser.

Features

• PDF Viewing: Open and navigate through multi-page PDF documents in a built-in viewer
• Signature Overlay: Load a PNG signature image and position it anywhere on the document
• Drag and Resize: Easily position and resize your signature using intuitive controls
• Multi-Page Support: Applies your signature to all pages of the PDF automatically
• Signature Guide: Visual guide line helps position your signature correctly
• Local Processing: All document handling is performed locally in your browser for maximum privacy

Chrome Web Store

Installation (Developer Mode)

1. Clone this repository or download the ZIP file
2. Open Chrome and navigate to chrome://extensions/
3. Enable "Developer mode" in the top right corner
4. Click "Load unpacked" and select the extension directory

Usage

1. Navigate to a PDF document in your browser (or open a PDF check from QuickBooks Online)
2. Click the QuickSign extension icon in your Chrome toolbar
3. The PDF opens in the QuickSign viewer
4. Click "Choose Signature" to select a PNG image of your signature
5. Drag the signature to position it on the document
6. Use the blue handle in the bottom-right corner to resize the signature
7. Click "Apply Signature" to embed the signature on all pages and download the signed PDF

How It Works

The extension intercepts PDF pages and opens them in a custom viewer. When you add a signature:

1. The PNG image is overlaid on the PDF canvas at your chosen position
2. When you save, the extension uses PDF-lib to embed the image directly into the PDF
3. The signature is applied to every page of the document at the same position
4. A new PDF is generated and downloaded to your computer

Technical Details

The extension is built with vanilla JavaScript and uses the following libraries:

• PDF.js (Mozilla) - PDF rendering and viewing
• PDF-lib - PDF manipulation and modification

Permissions

• activeTab - Access the current tab to detect PDF pages
• scripting - Inject scripts to detect PDF content
• <all_urls> - Required to open the viewer on any PDF URL

Use Cases

• Signing QuickBooks Online PDF checks without printing
• Adding signatures to any PDF document directly in the browser
• Batch signing multiple pages with the same signature at consistent positions