PDF Simple Editor

A lightweight, powerful, and modern PDF editor built with WinUI 3 and .NET 10. Powered by the iText 9 engine, it provides a seamless experience for editing text, managing pages, and organizing PDF documents.

🚀 Features

📝 Precision Editing

• Text Edit
  • Original Mode: After activating the Select tool, click or drag to select, double-click to edit, and Alt+Drag to move.
    • Ctrl+Enter or right-click confirms, Esc cancels.
    • If an overlap warning appears, drag to select only the overlapping fragment and edit it.
    • Single-line selections expand to the right; multi-line selections wrap to the line below.
    • If the original font is not available, a fallback font is used instead.
  • Replace Mode: After activating the Select tool, click to select and drag to move.
    • Ctrl+Enter or right-click confirms, Esc cancels.
    • If characters are clipped or letter spacing looks too tight after editing, select the box and enlarge it.
• Add Text: Press A to switch to the Add Text tool, then add text with custom font family, size, color, bold, and italic. Enter inserts a line break, Ctrl+Enter confirms, and Esc cancels.
• Images: Insert images, save a selected image as a file, or extract all embedded images to a folder.

🖋️ Annotation & Highlighting

• Smooth Highlighting: Add semi-transparent highlights to text blocks.
• Advanced Color Control: Integrated color picker (eyedropper) and transparency sliders to customize highlight styles.
• Signature Tool: Draw, customize, select, move, resize proportionally, edit, and save mouse-drawn signatures for reuse after reopening the PDF.

📂 Document Management

• Multi-Tab Interface: Work on multiple PDF files simultaneously using a modern tabbed layout.
• Page Operations: Select multiple pages with Ctrl/Shift, reorder them, delete unnecessary pages, or extract selected pages into a new PDF.
• Merge & Split: Combine multiple PDF files into one or split specific page ranges into new documents.
• Page Thumbnails: Navigate and manage pages quickly using the interactive sidebar and its right-click menu.

🛠️ Modern UX/UI

• WinUI 3 & Windows App SDK: Native look and feel with fluent design elements.
• Drag & Drop: Open files instantly by dragging them into the application.
• Text Search: Powerful search functionality to find specific phrases within the document.
• Keyboard Shortcuts:
  • S: Switch to Select Tool
  • A: Switch to Add Text Tool
  • Ctrl+O: Open File
  • Ctrl+S: Save File
  • Ctrl+F: Find Text

🛠️ Technology Stack

• Framework: .NET 10.0
• UI Framework: WinUI 3 (Windows App SDK)
• PDF Engine: iText 9.0 (Core, PdfSweep, BouncyCastle)
• Language: C#

⚙️ Installation

📥 Download

You can download the latest version from the Releases Page.

Prerequisites

• Windows 10/11 (version 19041 or higher)
• .NET 10 SDK

Build from Source

1. Clone the repository:

   git clone https://github.com/kirinonakar/PDF_simple_edit.git

2. Open the solution in Visual Studio 2022 (or later).
3. Restore NuGet packages.
4. Build and run the PDF_simple_edit project.

📄 License

This project is licensed under the GNU Affero General Public License v3.0 - see the LICENSE file for details.