Punycode / IDN API
Convert internationalized domain names (IDNs) between their human-readable Unicode form and the ASCII Punycode form (xn--…) that DNS actually uses. Encode a Unicode domain like münchen.de or 例え.jp (or even an emoji label like ☕.example) to ASCII, decode an xn-- domain back to Unicode, and convert a whole URL's host in either direction. Handles accents, non-Latin scripts and emoji. Useful for IDN domain handling, email and URL validation, DNS tooling, and spotting homograph / look-alike domains. Pure local IDNA conversion — no key, no third-party service, instant. Live. 4 endpoints. Distinct from Public-Suffix-List domain parsing and from generic text encoders.
api.oanor.com/punycode-api
