Punycode / IDN Converter

Convert a domain to and from Punycode, and see whether it could be imitating another.

What you provide

Either the readable form or the xn-- encoded one.

Result

CHECK

xn--mnchen-3ya.de

This domain contains characters outside ASCII, so it is registered as xn--mnchen-3ya.de and only rendered in its readable form by software that chooses to. That gap is what homograph attacks use: Cyrillic а, е and о are visually identical to their Latin counterparts in most fonts, so a domain can be indistinguishable from a brand it is imitating while being an entirely different registration. Browsers defend by showing the Punycode form when a label mixes scripts, which is why a suspicious domain sometimes appears as xn-- in the address bar.

Diagnostic telemetry
ASCII (Punycode)What is actually registered and sent in DNS queries.
xn--mnchen-3ya.de
As entered
münchen.de
Contains non-ASCIINon-ASCII characters can imitate Latin letters closely enough to be indistinguishable in a browser bar.
Yes

What this cannot tell you

  • Converts and flags non-ASCII characters. It does not judge whether a specific domain is imitating a specific brand — that needs the brand as a comparison, which the lookalike checker does.
  • Uses the browser's own URL parser rather than a hand-written implementation, because a subtly wrong homograph tool is worse than none.
  • Runs entirely in your browser. Nothing is looked up, transmitted or stored.

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Punycode / IDN Converter on RunTheTests — free browser-based netmath tools, no sign-up.