为什么仅 one 标签在域启动具有 xn--?

每个标签是 encoded independently. 'münchen.de' becomes 'xn--mnchen-3ya.de' — 仅 non-ASCII 标签 gets xn-- prefix; pure-ASCII labels 通过通过 unchanged.

能够 I use Unicode form directly 在 browser?

现代 browsers display Unicode form 但发送 Punycode form 到 DNS. 一些 contexts (email, certificates) 可以 require Punycode form explicitly 为 compatibility.

转换 an ACE-encoded domain (xn--...) back to its readable Unicode form, and encode Unicode domains for DNS lookup.

1

DNS 仅 accepts ASCII. Internationalized Domain Names (IDN) 是 encoded as Punycode: Unicode 标签 becomes xn--<ascii>. Decoding restores 原始 Unicode characters 为 display.
2

Punycode 解码器 →
Paste ACE 标签 (e.g. xn--mnchen-3ya) 到 get Unicode form (münchen). 为完整域, 解码每个标签 separately.
3

Punycode 编码器 →
反转 direction: paste a Unicode domain label to get the xn-- form safe for DNS resolution.
4

URL 解析器 →
Paste 完整 URL containing xn-- 主机. parser resolves 主机标签和 lets 你 confirm Punycode ↔ Unicode 映射.

为什么仅 one 标签在域启动具有 xn--?: 每个标签是 encoded independently. 'münchen.de' becomes 'xn--mnchen-3ya.de' — 仅 non-ASCII 标签 gets xn-- prefix; pure-ASCII labels 通过通过 unchanged.
能够 I use Unicode form directly 在 browser?: 现代 browsers display Unicode form 但发送 Punycode form 到 DNS. 一些 contexts (email, certificates) 可以 require Punycode form explicitly 为 compatibility.