ASN2TXT is a command-line tool that translates ASN.1 data encoded in the Basic, Canonical, Distinguished, or Packed encoding rules into various text formats suitable for ingestion into spreadsheets, databases, or other text processing tools. At the time of initial release, ASN2TXT supports converting ASN.1 data to XML and comma-separated value (CSV) data formats.

Conversions to XML support both an Objective Systems custom format as well as the XML Encoding Rules standard as described in ITU-T standard X.693. Conversions from all ASN.1 binary encodings (BER, CER, DER, PER) are supported by ASN2TXT.

Conversions to CSV are done by a custom transformation, since no standard for converting ASN.1-encoded data to CSV exists. Conversions from BER, CER, and DER are supported at the time of this release; PER is not supported.