GroupDocs.Signature for Node.js

Create, apply, and verify digital signatures in documents using a powerful Node.js e-signature SDK built on top of GroupDocs.Signature for Java. Add electronic, barcode, QR-code, image, text, metadata, and form field signatures to 90+ document formats including PDFs, Word, Excel, Images, and more.

✅ Supports create digital signature, esign pdf, sign Word document, verify signature, and remove barcode/QR code from PDF.

🚀 Key Features

• Add electronic and digital signatures to over 90 formats (PDF, DOCX, XLSX, PPTX, etc.)
• Create signatures from image, barcode, QR code, stamp, metadata, or form fields
• Verify and remove digital signatures, barcodes, or QR codes
• Digitally sign documents using X.509 certificates (PKCS#12/PKCS#7)
• Add invisible metadata and interactive form field signatures
• Batch-sign documents or apply multiple signature types
• Fully compatible with Node.js 16+

🔧 Supported Signature Types

Signature Type	Description
Digital Signatures	Use X.509 certificates (legal, secure, and verifiable)
Image Signatures	Apply scanned signatures or logos as visual marks
Text Signatures	Custom text with styling and position
QR-Code Signatures	Add QR codes with encoded text/data
Barcode Signatures	Add or verify 1D/2D barcodes (e.g., Code128, Aztec)
Stamp Signatures	Timestamps, roles, and system metadata stamps
Metadata Signatures	Add invisible data for tracking and auditing
Form Field Signatures	Add fillable form signature fields to documents

📁 Supported Document Formats

Office Formats:

• Word: DOC, DOCX, DOCM, DOTX, DOTM
• Excel: XLS, XLSX, XLSM, XLSB
• PowerPoint: PPT, PPTX, PPS, PPSX
• Visio: VSD, VSDX, VSSX

Others:

• PDF, PDF/A
• Images: JPG, PNG, TIFF, BMP, GIF, SVG
• OpenDocument (ODT, ODS, ODP)
• TXT, RTF, CSV, HTML, XML, JSON, and more

💡 Use Cases

• Digitally sign documents using X.509 certificates
• Add signature fields for web and mobile UI integration
• Barcode & QR code verification for automation pipelines
• Invisible metadata signing for compliance & version tracking
• Search and remove unwanted signatures
• Integrate e-signatures into Node.js SaaS or cloud platforms

📦 Installation

Install via npm:

npm install @groupdocs/groupdocs.signature

How to Sign a PDF File using Node.js

  const signature = new groupdocs.signature.Signature(pdfFilePath);

  // Create QR code sign options
  const options = new groupdocs.signature.QrCodeSignOptions('JohnSmith');

  // Setup QR code encoding type
  options.setEncodeType(groupdocs.signature.QrCodeTypes.QR);
  
  // Set signature position
  options.setLeft(100);
  options.setTop(100);

  // Sign document to file
  signature.sign(outputFilePath, options);

How to Search for Digital Signatures in Excel XLSX using Node.js

const signature = new groupdocs.signature.Signature('spreadsheet.xlsx');
const options = new groupdocs.signature.DigitalSearchOptions();

// Search for signatures in the document
const signatures = signature.search(options).toArray();

console.log('\nSource document contains the following signatures.');
for (const digitalSignature of signatures) {
  console.log(`Digital signature found from ${digitalSignature.signTime} with validation flag ${digitalSignature.isValid}. Certificate SN ${digitalSignature.certificate.type}`);
}

📚 Documentation & Resources

• Official Documentation
• API Reference
• Live Demos
• Code Samples
• Free Support Forum
• License Terms

🖥️ Node.js Compatibility

• Node.js 16.x, 18.x, 20.x
• OS: Windows, Linux, macOS
• Cloud: AWS, Azure, GCP
• Containers: Docker, Kubernetes

Why Choose GroupDocs.Signature for Node.js?

• Java-powered performance and stability via Node.js wrapper
• Full support for 90+ document types
• No Adobe or Office dependency
• Modern async API structure
• Secure and standards-compliant (X.509, PDF/A, PKCS#7)
• Enterprise-ready SDK for large-scale applications

Security & Compliance

• Digital Certificate Support: RSA, DSA, ECDSA
• Standards: PDF/A, PKCS#7, X.509
• Audit Trail: Signature metadata and verification history
• Secure APIs: OAuth2, HTTPS, and environment-isolated processing

Looking for Other SDKs?

• 👉 .NET SDK
• 👉 Java SDK
• 👉 Python SDK

Contribute

This repo contains usage examples and templates. We welcome community contributions!

• Submit issues
• Fork the repo
• Improve examples and docs

📜 License

This project is licensed under the GroupDocs EULA.

© 2025 GroupDocs. All rights reserved.