Helpful, easy to use utilities for ASN.1, JSON, and NAS users:

  • ASN.1 Playground
    Compile, encode, and decode ASN.1 schemas.
  • ASN.1 Analyzer
    Improve your ASN.1 schema.
  • ASN1Doc
    Create an HTML document from your ASN.1 schema with a few clicks.
  • JSON/Schema2Asn
    Generate an ASN.1 schema from a JSON message or a JSON schema with a few clicks.
  • NAS Playground
    Decode your NAS messages.
  • ASN1Vsix
    This ASN.1 extension for Microsoft Visual Studio, which is available for Visual Studio or Visual Studio Code, makes it faster and easier to create, modify, and validate your ASN.1 schemas.
  • Dynamic Codec (DCodec)
    Schema-based and Schema-less messages for JSON and binary.
  • Proto2ASN
    Migrate Proto schemas into ASN.1 schemas.

asn.1 made simple

ASN.1 Made Simple

If you are new to ASN.1 and want to find out more about it without going too deeply into technical details, you may want to check out our short ASN.1 overview with simple examples and explanations of the most common ASN.1 features.


ASN.1 Workflow

Read about the workflow of developing with ASN.1, from defining your data and protocols in an ASN.1 specification, to developing and running an application that uses ASN.1.



Most asked questions about ASN.1.

reference card

ASN.1 Reference Card

Looking for a quick reference? Get an ASN.1 Reference Card in PDF format. Easy to read, easy to print.



Standard documents that define the ASN.1 language, as well as many standards that employ ASN.1 for data and protocol definitions.



Our list of ASN.1 books, other publications and external links about ASN.1.



Comprehensive glossary of ASN.1 terms.


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