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Overview

PDF digital signature and timestamp are the best ways to protect your PDF files from being forged. Syncfusion Essential PDF is a .NET PDF library that helps you add digital signature and time stamp to your PDF files in any .NET application, whether it is on Windows Forms, WPF, ASP.NET (web forms, MVC, Core), or even UWP, Xamarin.Forms, Xamarin.Android, and Xamarin.iOS. Syncfusion provides many ways to digitally sign a document: X509 certificates, such as .pfx files with private keys and also supports hardware security modules (HSM), Online Certificate Status Protocol (OCSP), certificate revocation lists (CRL), and Windows Certificate Store for authenticity and integrity.


Customize Appearance

The Syncfusion .NET PDF library provides a completely customizable appearance for its digital signatures. The content of the signature can be images, texts, graphics, and shapes.

Custom Appearance


LTV

Long-Term Validation (LTV)

LTV signatures allow you to check the validity of a signature long after signing the document. All the required elements for signature validation must be embedded in the signed PDF to use LTV.


Timestamp PDF

It is possible to include the date and time of your signing the PDF as part of your certificate-based digital signature. A timestamp helps you establish when you signed the PDF and reduces the chance of an invalid signatures. Syncfusion Essential PDF makes time-stamping a PDF document possible with only a few lines of code.

Timestamp


Certificate details

Certificate Details

You can also get or retrieve the digitally signed certificate details like subject, author, and expiry date. Based on the expiry date, you can digitally sign the PDF with valid certificate again.


Additional features of digital signatures and timestamps

  • Sign existing PDFs with digital signatures.
  • Add multiple digital signatures to a PDF.
  • Add signature validation to a PDF.
  • Time-stamp an existing PDF document.
  • Time-stamp a PDF without a certificate.


PRICING

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File Formats

$ 995

One developer per license

Developer Platform

Essential Studio

$ 1,995

One developer per license

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Unlimited Global License

Cover everyone in your organization for one low annual fee

CONTACT US
DEVELOPER PLATFORM
1,000+ web, desktop, and mobile controls
Predictive Analytics
File Formats (Word, Excel, PowerPoint, and PDF)
DATA PLATFORM
Dashboard Platform
Big Data Platform
Report Platform
Data Integration Platform
SUPPORT
Dedicated Account Representative
Quarterly product releases
Support within 24 hours on all business days
LICENSING
Licensing Management Portal
Commercial Use
Max Developer Count
1 per license
1 per license
Unlimited
Coverage Period
1 year
1 year
1 year

RESOURCES

CASE STUDY

Syncfusion’s file format components helped me create the reports I needed, fast. – J. Pereira, Software Developer.

The libraries have been built from scratch and refined for more than a decade to provide blazing-fast performance, comprehensive API, and compatibility across the latest and older versions of these files.

CONTINUE READING View all Customer Stories

VIDEOS

Syncfusion File Format Libraries - Manipulate Excel, Word, PowerPoint, and PDF files

Read and write Excel, Word, PDF, and PowerPoint files. Also includes integrated visualization capabilities. Advanced features include support for pivot tables, pivot charts, mail-merge, and extensive formatting.

E-BOOK

Succinctly Series: Statistics Using Excel Succinctly

Succinctly Series: Statistics Using Excel Succinctly


- by Charles Zaiontz
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Working with the industry’s best and brightest minds to streamline reporting

Syncfusion Customers
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  • "An excellent toolset and a great support team. I’ve been using Syncfusion’s products for a couple of years, and they save me a lot of time on development."
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Awards

Greatness—it’s one thing to say you have it, but it means more when others recognize it. Syncfusion is proud to hold the following industry awards.

Syncfusion Awards
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