Punycode / IDN Converter

IPOK dev tools provide fast network diagnostics and data conversions, including IP purity, subnet risk, DNSBL blacklist, and ASN routing lookups.

DNS only understands ASCII underneath, so internationalized domain names (IDNs) in Chinese, emoji, etc. are encoded as Punycode — the xn-- strings you often see. This tool converts both ways: enter 例子.中国 to get the xn-- form, or paste an xn-- string to recover the plain text.

Conversion is local, never uploaded. ⚠️ Security note: look-alike IDNs are often used for phishing (e.g. a Cyrillic а disguised as Latin a) — be wary of unfamiliar xn-- domains. Want to know if the server IP a domain resolves to is clean? Check it here too.

IDNs (internationalized domain names) are encoded as Punycode (ASCII starting with xn--) under the hood. Useful for Unicode / emoji domains, or to decode an xn-- back to plain text. Local, never uploaded. ⚠️ Note: look-alike IDNs are often used for phishing (e.g. Cyrillic disguises) — be wary of xn--.

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FAQ

What is an xn-- domain?

It's the Punycode encoding of an IDN (internationalized domain name). Browsers sometimes show the plain form, sometimes xn--; this tool converts between them.

Why convert to Punycode?

Because DNS resolution and domain registration only accept ASCII underneath, so Unicode / emoji domains must be turned into the xn-- form to work.

How is Punycode related to phishing?

Attackers register look-alike domains with similar Unicode characters (homograph attacks) that display almost identically but have a different Punycode (xn--). Converting a suspicious domain to Punycode unmasks the disguise.