0x4z.biz Tools

Punycode Generator – Unicode ⇄ ASCII (IDN Converter)

Reliably convert internationalized domains (IDN) between Unicode (e.g., münchen.de) and Punycode (e.g., xn--mnchen-3ya.de).

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Online‑Tool

Examples

  • münchen.de ⇄ xn--mnchen-3ya.de
  • пример.рф ⇄ xn--e1afmkfd.xn--p1ai
  • 東京.jp ⇄ xn--1lqs71d.jp

What is Punycode?

Punycode ist eine kodierte ASCII‑Darstellung internationalisierter Domainnamen (IDN), damit nicht‑lateinische Zeichen in DNS genutzt werden können.

SEO hint

Display Unicode in user‑visible links; certificates & DNS often use Punycode.

Best practices: IDN, Punycode & SEO

  • Title & meta description: concise, primary keyword first, clear benefit.
  • Search intent: conversion tool—keep it fast and distraction‑free.
  • FAQ schema: see markup below—can trigger rich results.
  • Internal links: link to related tools/guides (e.g., IDN checker, URL encoder).
  • Core Web Vitals: lightweight CSS, minimal JS → strong LCP/CLS/INP.
Does it support subdomains?
Yes. Each label is converted separately (e.g., shop.münchen.de).
Which library is used?
PHP intl extension (IDN, UTS#46), widely available on shared hosting.
Can I paste full URLs?
Yes. The host is extracted automatically.
Any SEO implications?
Prefer Unicode for visible links; use canonical & hreflang to avoid duplicates.
How to mitigate IDN homograph attacks?
Use whitelists, visual checks, and server‑side normalization (IDNA UTS#46).