libidn ☆
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Description:
International domain name library
Type: Formula  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  formulae.brew.sh
Category: Networking
Tags: library idn networking internationalization domain-names
Install: brew install libidn
About:
Libidn is a mature, stable C library for internationalized domain names (IDN) that implements the Stringprep, Punycode, and Nameprep specifications. It allows applications to correctly process and display domain names containing non-ASCII characters, ensuring compatibility with internationalized top-level domains. This library is a foundational component for many networking and web-related software projects.
Key Features:
  • Implements Stringprep, Punycode, and Nameprep profiles
  • Command-line utilities for testing and conversion
  • Thread-safe and suitable for integration into server applications
  • Supports both IDNA2003 and newer specifications
Use Cases:
  • Enabling web browsers and servers to resolve internationalized domain names
  • Validating and converting domain names in networking tools and scripts
  • Integrating IDN support into custom applications and libraries
Alternatives:
  • libpsl – Focuses on Public Suffix Lists rather than core IDN encoding/decoding, but often used alongside libidn.
  • ICU (International Components for Unicode) – A much larger, comprehensive library for Unicode support that includes IDN functionality but adds significant overhead.
Version History
Detected Version Rev Change Commit
Sep 10, 2024 6:01am 0 VERSION_BUMP ebbcd4af
Jan 13, 2024 11:34pm 0 VERSION_BUMP 6d56bf51
Sep 13, 2023 3:56pm 0 VERSION_BUMP 214c2ac3
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