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Add digital signatures to PDFs programmatically using the power of modern technologies. This allows you to automate the signing process and enhance the trustworthiness of your documents.

An x509certificate2 certificate is an encryption certificate used to digitally sign PDF documents. This allows us to encrypt them, ensuring that they have not been edited or altered in any way.

Allow your project's target end users to add protections to their PDF documents by integrating C# Digital Signature PDF from IronSoftware. This tool creates PDFs with permissions, password protection, digital signatures, and metadata management.

Easy PDF Editing that works offline. Upload PDF Files, Edit PDF, Save and Share PDF.

Easy PDF Editing that works offline. Upload PDF Files, Edit PDF, Save and Share PDF.

Easy PDF Editing that works offline. Upload PDF Files, Edit PDF, Save and Share PDF.

EzPDFsign is a PDF digital signing & encrytion software tool, it allows you to encrypt PDF document, sign them using a digital certificate and timestamp the signature. EzPDFsign is full comply with PDF standards.

Java component that creates/adds a digital signature to a PDF file. It is very easy to use, just 2 lines of Java code are required. It can be used in comercial products. It works on Java 1.5 or later.

E-sign PDF File is a free tool offered as a convenient way to try digitally signing PDF documents.

Digital sign PDF documents with PKI and Biometric Signature or Fingerprints. It enables document binding that secures PDF from any tempering.