Looking for a GemBox .NET PDF Library alternative?
Advanced .NET PDF Library for Creating, Editing
and Converting PDFs
Effortlessly embed a comprehensive, high-performance PDF engine into your .NET apps. Create, read, edit, convert, and secure PDF documents with our .NET PDF Library.
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Up to 9x Faster PDF Operations
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Minimal Memory Footprint
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24/5 Premium Support
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Up to 9x Faster PDF Operations
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Minimal Memory Footprint
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24/5 Premium Support
Trusted by the world's leading companies
Interactive .NET PDF Library Playground
This example code shows how to create a PDF document using the Syncfusion .NET PDF library with just a few lines of code in C#.
Performance Benchmark
Syncfusion PDF Library outperforms GemBox PDF with faster processing in most operations, exceptional memory efficiency, and superior handling of complex PDF tasks.
Task
Syncfusion .NET PDF Library
GemBox PDF Library
Convert images to PDF
Splitting 2 page PDF
Merge PDF
HTML to PDF
Word to PDF
Apply Watermark (2 pages)
Extract Text (1 page)
Redact text
Memory Benchmark
Test Scenario
Syncfusion .NET PDF Library
GemBox PDF Library
Apply watermark
Merge PDF
HTML to PDF
Word to PDF
Convert 2 Images to PDF
Advanced Annotation and Markup
Offers comprehensive interactive annotation capabilities: add, modify, delete 20+ annotation types—including pop-ups, shapes, freehand, ink, 3D—fully stylable, customizable icons/borders, and cross‑platform API support for collaborative markup workflows.
Form Fields
Enables seamless creation and management of AcroForms: add text boxes, combo, checkbox, radio, list and signature fields; populate, read, edit, import/export data in FDF/XFDF/JSON/XML formats; flatten fields; and embed submit/reset or JavaScript-driven actions.
Text and Image Extraction
Empowers developers to extract text—plain or layout‑preserved—from specific pages or entire documents, and efficiently retrieve all images with metadata (bounds, index) either per page or across the entire PDF, using memory‑optimized APIs.
Document Conversion
Enables seamless conversion across formats: convert Word, Excel, PowerPoint, HTML, rich media, and images to PDF (including charts), and export PDF pages to image formats—without requiring Microsoft Office or Adobe dependencies.
Built for Power and Precision
Streamline workflows with advanced PDF tools. Split, merge, compress, and convert with compliance. Add interactive media, barcodes, and rich styling, plus integrate seamlessly with cloud storage.
Why Syncfusion is the Right Pick for You?
24+ Years Proven
Mature, stable, and trusted by enterprises in mission-critical applications for nearly two decades.
Secure and Private
No external calls or data sharing—everything processes on your server for maximum security and compliance.
Continuous Development
Actively maintained with regular updates and feature enhancements based on real customer feedback.
Backed by Global Trust
Trusted by 1M+ developers, 36K+ companies, and 400+ Fortune 500 enterprises over 24+ years of innovation and excellence.
Microsoft Collaboration
We actively collaborate with Microsoft to advance the .NET developer ecosystem. Our free and open-source .NET MAUI Toolkit is a key contribution, empowering developers to build modern cross-platform apps with ease.
Enterprise-Proven Solutions
Our UI components power high-scale SaaS platforms, trusted to handle millions of user interactions daily. Syncfusion’s reliability is proven in our own enterprise products, including BoldDesk and BoldSign, solutions that are widely adopted and loved by customers across industries.
Developer Support That Never Lets You Down
Documentation
Easy-to-follow guides, detailed API references, and real-world code examples via GitHub, NuGet, and our official docs.
Dedicated support
Unlimited tickets and fast 24-hour guaranteed responses via live chat, forums, and our support portal.
Community Engagement
A thriving developer community, frequently updated samples, and constantly evolving documentation.
Feature-by-Feature Comparison
Choosing the right PDF framework is crucial for delivering fast, reliable, and feature-rich document processing in your applications. Here’s how Syncfusion and GemBox compare on essential features:
Features
Syncfusion .NET PDF Library
GemBox PDF Library
PDF Creation & Editing
Yes
Yes
Merge/Split PDF
Yes
Yes
Annotations
Advanced 20+ types (text markup, stamp, link, popup, file, sound, shapes, ink, freehand, 3D); full CRUD + import/export (FDF, XFDF, JSON)
Lacks stamps, popups, shapes, audio, 3D; limited/no import/export formats
Flatten annotations
Yes
Yes
PDF Forms
Yes
Yes
Import and export form data from FDF
Yes
Yes
XFDF, and XML
Yes
Yes
Digital Signatures
Yes
Yes
PDF Encryption
Yes (RC4, AES, AES 256 revision 6 (PDF 2.0), and AES-GCM
Lacks AES-GCM and PDF 2.0 advanced encryption
Redaction
Text, Images, Forms
Text, Images, Forms
Draw Barcode to PDF
Full support built-in drawing of 1D (Code39, EAN-8/13, etc.) and 2D (QR, DataMatrix, PDF417) barcodes via API
Lacks built-in PDF barcode drawing API
HTML to PDF
Chromium Engine
Yes
Create PDF table
Yes
Yes
PDF template and layers
Yes
Yes
Word to PDF
Yes
Yes
Excel to PDF
Yes
Yes
PPTX to PDF
Yes
Yes
PDF to PDF/A
Yes
No
PDF/UA2 Accessibility
Yes
No
Modular Architecture
Yes
Yes
What Our Customers Say
Real feedback from developers who rely on Syncfusion every day.
Syncfusion Recognition Highlights
G2
Capterra
Total User Reviews
600+
800+
Rating
⭐ 4.5 / 5
⭐ 4.5 / 5
Need more information?
Get detailed documentation, explore live demos, or speak with our experts to find the perfect solution for your needs.
Create Stunning PDFs in Your .NET Apps with Ease
Unlock the full potential of Syncfusion .NET PDF Library — fast, reliable, and packed with features to create, edit, and secure PDFs effortlessly. Try it free today!
