DERP ASN.1 Web Parser for RPKI and Beyond

What is DERP?

DERP is a fast, modern web-based ASN.1 parser and editor — built with a strong focus on RPKI but fully compatible with any BER/DER/CER-encoded ASN.1 objects. It allows for editing and encoding ASN.1 objects without the need for complicated templates.

Open Interactive Editor

Features

  • 🔍 ASN.1 Object Parsing

    Supports all major encoding rules: BER, DER, and CER — seamlessly decode any ASN.1 structure.

  • 📝 Live Editing

    Modify parsed objects in real time through the intuitive interface.

  • ⚡ High Performance

    Built for speed and efficiency, even with large and complex structures.

  • 📦 RPKI Integration

    • Embed ASN.1 objects into a fully valid RPKI repository structure for testing.
    • Directly interact with RPKI relying parties (RPs) to validate your objects live.

  • 🌐 Web-Based Interface

    No installation required — accessible through your browser, locally or on this site.

Contributing

DERP is open-source. Contributions to the tool are welcome at the repository site .