PDF Viewer SDK - Digital Signatures

Add certificate-based signatures to PDF workflows

Sign PDFs, validate existing digital signatures, customize visible signature appearances, and review signature results within your application. Use the Syncfusion PDF Viewer SDK to add certificate-based signing to document review and approval workflows.

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Sign, validate, and review PDF documents

Add certificate-based digital signatures to PDF viewing and approval processes. Verify document integrity, inspect signature and certificate information, and present signed documents for review within a unified workflow.

Apply digital signatures

Sign PDFs using supported certificates and private keys to protect the integrity of the signed document content.

Validate signed PDFs

Verify signature integrity, inspect certificate information, and determine whether protected PDF content changed after signing.

Support approval workflows

Support digital signing workflows from signature preparation to validation and review, helping teams streamline approval processes with confidence.

Apply certificate-based digital signatures

Apply certificate-based digital signatures to help verify signer identity, protect document integrity, and support trusted approval workflows. Advanced signing operations are enabled through Syncfusion PDF Library integration.

Support PDF digital signature workflows for approval-driven document processes.
Enable certificate-based signing through Syncfusion PDF Library integration.
Help preserve document authenticity and detect post-signing changes.
Keep signing aligned with document review and approval workflows.

Add PDF digital signatures.

Validate PDF digital signatures.

Validate signed PDFs

Verify digital signatures and determine whether a document has been modified after signing. Review signature status, certificate trust, and document integrity before accepting, approving, or distributing documents.

Validate signed PDF documents during review workflows.
Check signature validity, certificate trust, and document integrity.
Identify whether content has been altered after signing.
Support dependable verification through Syncfusion PDF Library integration.

Customize signature appearance

Control how visible digital signatures appear in PDF documents. Include signer information, images, timestamps, and other presentation details to create signing experiences that align with business and compliance requirements.

Customize visible signature content for signed PDF documents.
Include signer information, images, and timestamps in the signature appearance.
Present signatures in a format that fits business review requirements.
Create consistent signature experiences through Syncfusion PDF Library integration.

Customize digital signature appearance.

CERTIFICATE-BASED SIGNING PROCESS

Move PDFs from preparation to signature review

Digital signature workflows often involve more than a single signing step. The Syncfusion PDF Viewer SDK supports a structured path from signature field preparation to signing, validation, and final review. Advanced PKI-based signing and verification are enabled through integration with the Syncfusion PDF Library.

Prepare

Add or place signature fields where approvals are required in the PDF workflow.

Sign

Apply a certificate-based digital signature through Syncfusion PDF Library integration.

Validate

Check signature validity, certificate trust, and document integrity after signing.

Review

Review the signed document and move it forward with greater confidence.

PLATFORM SUPPORT

PDF digital signature capabilities across platforms

Certificate-based signing, signature validation, visible appearance customization, and digital signature workflows are available across supported PDF Viewer SDK platforms. Certificate access, private-key storage, validation configuration, and implementation details vary by platform.

Capability	JS, React, Angular, Vue	Blazor	ASP.NET Core & MVC	WPF	.NET MAUI	Flutter
Add digital signatures
Validate digital signatures
Customize signature appearance
Digital signature workflows

supported partially supported not supported

Frequently Asked Questions

✅ Does the PDF Viewer SDK support certificate-based digital signatures?

Yes. The Syncfusion PDF Viewer SDK supports digital signature workflows, and advanced certificate-based signing is enabled through integration with the Syncfusion PDF Library.

✅ Can the visual appearance of a digital signature be customized?

Yes. Visible digital signature appearance can be customized with signer information, images, timestamps, and related presentation details through the Syncfusion PDF Library.

✅ Are digital signatures the same as handwritten or typed signatures?

No. Digital signatures are certificate-based and used to verify authenticity and integrity. Handwritten or typed signatures are visual signature experiences and serve different workflow needs.

✅ Can signed PDF documents be validated?

Yes. Digital signature validation can verify whether a document has been modified after signing by checking signature validity, trust status, and document integrity through Syncfusion PDF Library support.

✅ Does this support complete signing workflows?

Yes. The Syncfusion PDF Viewer SDK supports workflows that include signature field preparation, document signing, signature validation, and review for approval-driven PDF processes.

✅ Is Syncfusion PDF Library required for advanced digital signature operations?

Yes. Advanced PKI-based digital signing, validation, and visible signature appearance customization require integration with the Syncfusion PDF Library.

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