Sign PDF documents with X.509 certificates using PAdES standards

PDF Digital Signature API with PAdES Compliance

Sign PDF documents with legally-compliant digital signatures using X.509 certificates. Supports multiple PAdES signature levels (B, T, LT, LTA) with optional visible stamps.

What this workflow does

This workflow creates a professional PDF signing service that:

- Accepts PDF files via webhook API - Signs documents using X.509 certificates (PFX format) - Returns cryptographically signed PDFs compliant with EU eIDAS standards - Supports both visible and invisible signatures - Provides multi-language landing pages for easy testing

Perfect for contracts, invoices, legal documents, and any PDF requiring digital authentication.

Use Cases

- Legal Document Signing: Sign contracts and agreements with legally-binding digital signatures - Invoice Authentication: Add cryptographic signatures to invoices for validation - Regulatory Compliance: Meet EU eIDAS and other digital signature requirements - Document Archival: Create long-term valid signatures for permanent storage - Automated Signing Pipeline: Integrate PDF signing into your existing workflows