der-ascii ☆
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Description:
Reversible DER and BER pretty-printer
Type: Formula  |  Latest Version: 0.7.0@0  |  Tracked Since: Dec 17, 2025
Links: Homepage  |  formulae.brew.sh
Category: Developer tools
Tags: cryptography der asn1 developer-tools cli
Install: brew install der-ascii
About:
der-ascii is a command-line utility that converts DER and BER encoded binary data into a human-readable ASCII format. It provides a reversible transformation, allowing developers to inspect and modify certificate or ASN.1 structures in a text editor. The tool is particularly useful for debugging cryptographic protocols and understanding binary data formats.
Key Features:
  • Reversible conversion between binary DER/BER and ASCII text
  • Pretty-prints complex ASN.1 structures for readability
  • Lightweight, single-binary command-line tool
  • Supports both DER (Distinguished Encoding Rules) and BER (Basic Encoding Rules)
Use Cases:
  • Debugging and inspecting X.509 certificates and other ASN.1 structures
  • Modifying binary DER files using a standard text editor
  • Educational purposes for understanding cryptographic data formats
Alternatives:
  • openssl asn1parse – OpenSSL provides parsing but not a reversible ASCII format for easy editing.
  • dumpasn1 – DumpASN1 is excellent for detailed analysis but is read-only.
License: Apache-2.0
Bottles available for: arm64_tahoe, arm64_sequoia, arm64_sonoma, sonoma, arm64_linux, x86_64_linux
Version History
Detected Version Rev Change Commit
Oct 10, 2025 12:01pm 0 VERSION_BUMP 75e40b56
Sep 15, 2025 8:38am 0 VERSION_BUMP cb001b34
Jan 16, 2025 10:53pm 0 VERSION_BUMP f620f253
Sep 18, 2024 2:51pm 0 VERSION_BUMP 2d26c8e7
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