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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 signature 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 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 in the approval workflow.

PLATFORM SUPPORT

PDF digital signature capabilities across platforms

Certificate-based signing, signature validation, visible signature appearance customization, and digital signature workflows are available across web, desktop, and mobile platforms through Syncfusion PDF Library integration.

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

Frequently Asked Questions

Does Syncfusion PDF Viewer support certificate-based digital signatures?

Yes. The Syncfusion PDF Viewer 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 in Syncfusion PDF Viewer?

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 in Syncfusion PDF Viewer 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 in Syncfusion PDF Viewer?

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 Syncfusion PDF Viewer support complete signing workflows?

Yes. The Syncfusion PDF Viewer 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 in Syncfusion PDF Viewer?

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

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