Spire.PDFViewer is a standalone .NET library designed for Windows Forms applications, enabling developers to load, view, print, and export PDF documents—including encrypted files—without the need for Adobe Reader or other third-party software. It supports various PDF standards, provides customizable toolbars, and offers features such as bookmarks, page thumbnails, zoom controls, and multiple viewing modes.

Key Features

Load and View PDF Files Allows loading PDF documents from file, stream, or byte array.

• Supports PDF/A-1B and PDF/X1A standards.
• Opens and reads encrypted PDF files.

Export PDF to Image Converts PDF pages to popular image formats.

• Supports .bmp, .png, and .jpeg export.
• Useful for embedding or sharing PDFs as images.

Print PDF Documents Enables direct or dialog-based printing.

• Supports multiple orientations: landscape, portrait, automatic.
• Allows printing of up to 10 pages in the free version.

Customizable Toolbar Offers built-in and customizable toolbar controls.

• Drag-and-drop integration for quick setup.
• Option to design custom toolbars for specific project needs.

Bookmarks and Thumbnails Facilitates navigation within PDF documents.

• Bookmark panel for quick access to sections.
• Page thumbnails for fast page selection.

Zoom and Page Operations Provides flexible viewing options.

• Zoom in/out, fit page, page up/down.
• Supports rotation and various viewing patterns (single page, dynamic, etc.).

Wide PDF Content Support Handles a range of PDF content and formats.

• Supports hyperlinks, embedded fonts, lines, curves, tables.
• Compatible with multiple font types and color spaces.

Benefits

No Third-Party Dependencies Runs independently of Adobe Reader or other PDF software.

• Reduces deployment complexity.
• Ensures consistent behavior across environments.

Flexible Integration Fits diverse .NET Windows Forms projects.

• Customizable UI elements.
• Supports both standard and advanced PDF features.

Enhanced User Experience Improves document navigation and interaction.

• Bookmarks and thumbnails for efficient access.
• Multiple viewing modes for user preference.

Reliable Printing and Export Facilitates document distribution and sharing.

• High-quality image export.
• Flexible print options for various business needs.