Sign PDF in C# .NET
Digitally sign your PDF documents to confirm their authenticity using Documentize .NET Plugin
PDF Signature in C#
Digitally Sign PDFs in C# with Documentize PDF Signature for .NET. Add secure, legally binding electronic signatures to your PDF documents with the PDF Signature for .NET—the ultimate solution for authenticating and protecting contracts, invoices, reports, and official records. This powerful tool ensures document authenticity, integrity, and compliance with industry standards, making it ideal for businesses, legal professionals, and developers alike.
With seamless C# integration via the Documentize.Plugins library, developers can fully automate and customize the PDF signing process to meet their exact needs.
What You Can Do with PDF Signature By defining a SignatureDemo class class, you can:
🔹 Create a digital signature object with fully customizable settings.
🔹 Set signature parameters, including certificate details, signing reasons, and visual appearance.
🔹 Apply secure digital signatures directly to PDF documents.
🔹 Save signed PDFs to your desired location, ready for distribution.
Why Choose PDF Signature?
🔹 Legally Binding Signatures – Meet compliance requirements for electronic document signing.
🔹 Enhanced Security – Prevent unauthorized modifications after signing.
🔹 Full Developer Control – Automate workflows with flexible C# integration.
🔹 Professional Appearance – Customize signature visuals to match your brand or document style.
With PDF Signature, organizations and developers can easily integrate professional, secure, and compliant digital signature capabilities into their applications—streamlining document approval processes while ensuring maximum trust and protection.
How to Sign PDF Documents via .NET?
- Reference Documentize in your project
- Set your license keys
- Instantiate a
Sign PDFobject to set the stage for the PDF merging process - Create a new instance of the Signature plugin.
- Create a new instance of the SignOptions class and set the input PFX file path and password.
- Add the input file to the SignOptions.
- Add the output file to the SignOptions.
- Set the reason, contact information, and location of the signature
Why Choose Documentize Sign PDF?
- Secure & tamper-proof – Protect documents from unauthorized modifications.
- Flexible signature options – Use visible or invisible digital signatures.
- Compliance-ready – Meets legal and industry security requirements.
- Smooth .NET integration – Automate PDF signing in your applications.
- Detailed and high-quality documentation
Frequently Asked Questions
What does Documentize Sign PDF for .NET do?
Documentize Sign PDF for .NET is a plugin deSigned to Sign multiple PDF documents into a single PDF file within .NET applications. It simplifies the process, providing a convenient solution for consolidating PDF files.
Is Documentize Sign PDF for .NET limited to only to Sign multiple PDF into single PDF?
Yes, PDF Sign PDF for .NET is deSigned specifically for merging multiple PDF into single PDF. For other operations you can use other PDF plugins or the full capabilities of Documentize library.
Why should I use digital signatures for my PDFs?
Digital signatures verify the authenticity of a document, prevent unauthorized modifications, and help meet legal and compliance requirements for secure document handling.
Are digital signatures legally recognized?
Yes, digital signatures are legally binding in many regions and comply with regulations such as eIDAS, ESIGN, and UETA.
Does the tool support certificate-based signatures?
Yes, the tool allows the use of certificate-based digital signatures to enhance security and authentication.
Can I verify if a PDF has been tampered with after signing?
Yes, digitally signed PDFs include integrity verification, allowing users to check whether the document has been altered after signing.
