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Overview
Updated on Jun 3, 2026
The digital signature feature enables you to sign and validate a PDF document. A signature confirms that the document content originated from the signer and has not been modified. A signed document is considered valid when it has not been changed after signing, and all of its certificates have a valid trusted root certificate.
Telerik RadPdfProcessing provides an API that allows you to:
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Create a PDF document from scratch and add a signature field.
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Sign PDF documents that contain a predefined signature field.
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Multiple Digital Signing with PdfStreamSigner.
Online Demos
| Demo | Description |
|---|---|
| PdfProcessing Digitally Sign Document | Demonstrates how to digitally sign a PDF. |
| PdfProcessing Validate Digital Signature | Demonstrates how to validate a digitally signed PDF. |
| PdfProcessing Multiple Digital Signatures | Demonstrates how to digitally sign a PDF without invalidating existing signatures. |
See Also
- Form
- Form Fields
- AcroForm
- SignatureField
- Signing a document with a digital signature
- Widgets Types
- How to Create Invisible Signatures for PDF Documents
- Signing a PDF Document with a SignatureWidget
- Verifying If Digital Signatures Exist in PDF Documents
- Signing an Unsigned PDF Document that Contains a Digital Signature with RadPdfProcessing