GroupDocs.Signature for Python

Create, apply, and verify digital signatures in documents with an advanced Python e-signature API. 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 pdf doc, verify signature, and remove signatures features across multiple platforms.

Key Features

• Add electronic signatures to 90+ document formats including PDF, DOCX, XLSX, PPTX, PNG, TIFF, and more
• Create signatures from image, barcode, QR code, stamp, text, metadata, or form fields
• Support for signature validation, verification, and removal
• Search and remove existing signatures from documents
• Apply multiple signatures of different types to a single document
• Built-in support for digital certificates (X.509, PKCS#7) for legally binding signatures
• Metadata signatures for document tracking and authentication
• Form field signatures for interactive document workflows
• Integrate into your signature app or web-based e-sign platform
• Cloud-based API with Python SDK for scalable document processing

🔧 Supported Signature Types

Signature Type	Description
Digital Signatures	X.509 certificate-based signatures for legal compliance
Image Signatures	Draw or upload images (PNG, JPEG, SVG, BMP)
Text Signatures	Add custom text annotations with fonts & styles
QR-Code Signatures	Generate QR codes with custom data/format
Barcode Signatures	Add/search/remove barcodes from documents
Stamp Signatures	Custom stamps with date/user info/company logos
Metadata Signatures	Hidden signatures for document tracking & authentication
Form Field Signatures	Interactive signature fields for workflows

📁 Supported Document Formats (90+)

Office Documents:

• Microsoft Word (DOC, DOCX, DOCM, DOT, DOTX, DOTM)
• Excel (XLS, XLSX, XLSM, XLSB, XLT, XLTX, XLTM)
• PowerPoint (PPT, PPTX, PPTM, PPS, PPSX)
• Visio (VSD, VSDX, VSS, VSSX, VST, VSTX)

PDFs & Images:

• PDF (Portable Document Format)
• Images (PNG, JPG, JPEG, BMP, TIFF, GIF, SVG, WEBP)

Other Formats:

• OpenDocument (ODT, ODS, ODP)
• Text files (TXT, RTF, CSV)
• Web formats (HTML, HTM)
• And many more...

💡 Use Cases

• Sign PDF documents with digital certificates (X.509, PKCS#7)
• E-sign Word documents with image signatures or typed names
• Add signatures to Excel spreadsheets and CSV files
• Verify and validate e-signatures for authenticity
• Search and remove existing signatures from documents
• Metadata signatures for document versioning and tracking
• Form field signatures for interactive document workflows
• Batch processing multiple documents with signatures
• Web applications with Python Flask/Django integration
• Automated document workflows in Python scripts

🚀 How to run examples

• Call the following command from the root folder of repository
  python .\Examples\run_examples.py
• Review rendered files in .\Examples\Output folder

📦 Installation

Install via pip:

pip install groupdocs-signature-net

How to sign a PDF document with a digital e-signature

import groupdocs.signature as signature
from groupdocs.signature.options import DigitalSignOptions

# Initialize signature
with signature.Signature("sample.pdf") as sign:
    # Create digital signature options
    options = DigitalSignOptions("certificate.pfx")
    
    # Set certificate password
    options.password = "1234567890"
    
    # Optional: setup image file path
    options.image_file_path = "sample.jpg"
    
    # Set signature position
    options.left = 100
    options.top = 100
    
    # Sign document
    sign.sign("sampleSigned.pdf", options)

How to verify barcode signatures in a document

import groupdocs.signature as signature
from groupdocs.signature.options import BarcodeVerifyOptions

# Initialize signature
with signature.Signature("sample_signed.pdf") as sign:
    # Create verification options
    options = BarcodeVerifyOptions()
    options.text = "123456789"
    options.match_type = signature.TextMatchType.Contains
    options.all_pages = True  # verify on all pages
    
    # Verify signatures
    result = sign.verify(options)
    
    if result.is_valid:
        print("Document was verified successfully!")
    else:
        print("Document failed verification process.")

📚 Documentation & Resources

• Official Documentation
• API Reference
• Code Examples
• PyPI Package
• Free Support Forum
• Live Demos

🖥️ Python Version Support

GroupDocs.Signature for Python supports:

• Python 3.6+ (including Python 3.7, 3.8, 3.9, 3.10, 3.11, 3.12)
• Frameworks: Django, Flask, FastAPI, Pyramid
• Platforms: Windows, Linux, macOS
• Cloud: AWS Lambda, Google Cloud Functions, Azure Functions
• Containers: Docker, Kubernetes

📈 Why Choose GroupDocs.Signature for Python?

• Cloud-based API with high availability and scalability
• No software installation required - everything runs in the cloud
• RESTful API with comprehensive Python SDK
• High-performance signature processing for enterprise applications
• Memory-efficient processing of large documents
• Thread-safe operations for multi-threaded Python applications
• Comprehensive API with 90+ supported document formats
• Easy integration into existing Python signature applications
• Regular updates with new features and format support
• Async/await support for modern Python applications

🔒 Security & Compliance

• Digital Certificate Support: RSA, DSA, ECDSA algorithms
• Standards Compliance: PKCS#7, X.509, PDF/A compatibility
• Signature Validation: Timestamp verification and certificate chain validation
• Legal Compliance: Suitable for legally binding digital signatures worldwide
• Audit Trail: Complete signature history and document integrity verification
• Secure Cloud Storage: Enterprise-grade security with data encryption
• GDPR Compliant: Data processing complies with European privacy regulations

Looking for Other Platforms?

• GroupDocs.Signature for .NET
• GroupDocs.Signature for Java
• GroupDocs.Signature for Node.js
• GroupDocs.Signature for PHP

🙌 Contribute

This repository contains examples and demos for GroupDocs.Signature for Python. We welcome contributions and feedback!

• Report Issues
• Fork the repo and submit pull requests with improvements
• Help improve documentation and examples
• Share your integration experiences

Support & Contact

• Free Support Forum - Community help
• Paid Support - Priority technical support
• Sales Inquiry - Licensing questions
• Documentation - Complete guides

📜 License

This project is licensed under the GroupDocs EULA.

© 2025 GroupDocs. All rights reserved.

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