Nitro Sign PDF

Add Electronic and Digital Signatures to PDF Files

Whether you need to quickly eSign a PDF, apply a more specialized digital signature, or request a signature from a customer or colleague, Nitro Pro can meet any signing need.

It’s PDF productivity and eSigning, all in one place.

Electronically sign PDFs

QuickSign accelerates your daily tasks by giving you the power to sign and return PDFs in seconds without leaving Nitro Pro.

Add valid digital signatures

Acting much like a notary or third-party witness, a digital signature verifies a signer’s identity using their unique digital certificate. Nitro Pro allows you to add your own digital signature, which then encrypts and locks your document for a higher level of security and compliance.

What’s the difference between an electronic signature and a digital signature?

Ideal for signing most documents, such as contracts, POs, and invoices, an electronic signature is the electronic equivalent of signing a document with a handwritten signature. Anyone can quickly create and apply an electronic signature.

Rarely needed for eSigning, a digital signature uses encryption technology and digital certificates to verify the authenticity of a document and a signer’s identity. A digital signature requires that the user has access to a digital certificate and is only required for very specific types of documents in heavily regulated industries.