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<li><a href="https://nodejs.org/docs/latest-v9.x/api/punycode.html">9.x</a></li>
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<li><a href="https://nodejs.org/docs/latest-v8.x/api/punycode.html">8.x</a></li>
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<li><a href="https://nodejs.org/docs/latest-v0.10.x/api/punycode.html">0.10.x</a></li></ol>
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</header>
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<div id="toc">
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<h2>Table of Contents</h2>
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<ul>
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<li><span class="stability_0"><a href="#punycode_punycode">Punycode</a></span>
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<ul>
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<li><a href="#punycode_punycode_decode_string"><code>punycode.decode(string)</code></a></li>
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<li><a href="#punycode_punycode_encode_string"><code>punycode.encode(string)</code></a></li>
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<li><a href="#punycode_punycode_toascii_domain"><code>punycode.toASCII(domain)</code></a></li>
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<li><a href="#punycode_punycode_tounicode_domain"><code>punycode.toUnicode(domain)</code></a></li>
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<li><a href="#punycode_punycode_ucs2"><code>punycode.ucs2</code></a>
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<ul>
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<li><a href="#punycode_punycode_ucs2_decode_string"><code>punycode.ucs2.decode(string)</code></a></li>
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<li><a href="#punycode_punycode_ucs2_encode_codepoints"><code>punycode.ucs2.encode(codePoints)</code></a></li>
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</ul>
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</li>
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<li><a href="#punycode_punycode_version"><code>punycode.version</code></a></li>
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</ul>
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</li>
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</ul>
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</div>
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<div id="apicontent">
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<h1>Punycode<span><a class="mark" href="#punycode_punycode" id="punycode_punycode">#</a></span></h1>
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<div class="api_metadata">
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<span>Deprecated since: v7.0.0</span>
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</div>
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<p></p><div class="api_stability api_stability_0"><a href="documentation.html#documentation_stability_index">Stability: 0</a> - Deprecated</div><p></p>
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<p><strong>Source Code:</strong> <a href="https://github.com/nodejs/node/blob/v12.22.9/lib/punycode.js">lib/punycode.js</a></p>
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<p><strong>The version of the punycode module bundled in Node.js is being deprecated</strong>.
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In a future major version of Node.js this module will be removed. Users
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currently depending on the <code>punycode</code> module should switch to using the
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userland-provided <a href="https://github.com/bestiejs/punycode.js">Punycode.js</a> module instead.</p>
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<p>The <code>punycode</code> module is a bundled version of the <a href="https://github.com/bestiejs/punycode.js">Punycode.js</a> module. It
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can be accessed using:</p>
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<pre><code class="language-js"><span class="hljs-keyword">const</span> punycode = <span class="hljs-built_in">require</span>(<span class="hljs-string">'punycode'</span>);</code></pre>
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<p><a href="https://tools.ietf.org/html/rfc3492">Punycode</a> is a character encoding scheme defined by RFC 3492 that is
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primarily intended for use in Internationalized Domain Names. Because host
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names in URLs are limited to ASCII characters only, Domain Names that contain
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non-ASCII characters must be converted into ASCII using the Punycode scheme.
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For instance, the Japanese character that translates into the English word,
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<code>'example'</code> is <code>'例'</code>. The Internationalized Domain Name, <code>'例.com'</code> (equivalent
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to <code>'example.com'</code>) is represented by Punycode as the ASCII string
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<code>'xn--fsq.com'</code>.</p>
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<p>The <code>punycode</code> module provides a simple implementation of the Punycode standard.</p>
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<p>The <code>punycode</code> module is a third-party dependency used by Node.js and
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made available to developers as a convenience. Fixes or other modifications to
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the module must be directed to the <a href="https://github.com/bestiejs/punycode.js">Punycode.js</a> project.</p>
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<h2><code>punycode.decode(string)</code><span><a class="mark" href="#punycode_punycode_decode_string" id="punycode_punycode_decode_string">#</a></span></h2>
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<div class="api_metadata">
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<span>Added in: v0.5.1</span>
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</div>
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<ul>
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<li><code>string</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a></li>
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</ul>
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<p>The <code>punycode.decode()</code> method converts a <a href="https://tools.ietf.org/html/rfc3492">Punycode</a> string of ASCII-only
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characters to the equivalent string of Unicode codepoints.</p>
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<pre><code class="language-js">punycode.decode(<span class="hljs-string">'maana-pta'</span>); <span class="hljs-comment">// 'mañana'</span>
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punycode.decode(<span class="hljs-string">'--dqo34k'</span>); <span class="hljs-comment">// '☃-⌘'</span></code></pre>
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<h2><code>punycode.encode(string)</code><span><a class="mark" href="#punycode_punycode_encode_string" id="punycode_punycode_encode_string">#</a></span></h2>
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<div class="api_metadata">
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<span>Added in: v0.5.1</span>
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</div>
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<ul>
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<li><code>string</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a></li>
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</ul>
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<p>The <code>punycode.encode()</code> method converts a string of Unicode codepoints to a
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<a href="https://tools.ietf.org/html/rfc3492">Punycode</a> string of ASCII-only characters.</p>
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<pre><code class="language-js">punycode.encode(<span class="hljs-string">'mañana'</span>); <span class="hljs-comment">// 'maana-pta'</span>
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punycode.encode(<span class="hljs-string">'☃-⌘'</span>); <span class="hljs-comment">// '--dqo34k'</span></code></pre>
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<h2><code>punycode.toASCII(domain)</code><span><a class="mark" href="#punycode_punycode_toascii_domain" id="punycode_punycode_toascii_domain">#</a></span></h2>
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<div class="api_metadata">
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<span>Added in: v0.6.1</span>
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</div>
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<ul>
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<li><code>domain</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a></li>
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</ul>
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<p>The <code>punycode.toASCII()</code> method converts a Unicode string representing an
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Internationalized Domain Name to <a href="https://tools.ietf.org/html/rfc3492">Punycode</a>. Only the non-ASCII parts of the
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domain name will be converted. Calling <code>punycode.toASCII()</code> on a string that
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already only contains ASCII characters will have no effect.</p>
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<pre><code class="language-js"><span class="hljs-comment">// encode domain names</span>
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punycode.toASCII(<span class="hljs-string">'mañana.com'</span>); <span class="hljs-comment">// 'xn--maana-pta.com'</span>
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punycode.toASCII(<span class="hljs-string">'☃-⌘.com'</span>); <span class="hljs-comment">// 'xn----dqo34k.com'</span>
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punycode.toASCII(<span class="hljs-string">'example.com'</span>); <span class="hljs-comment">// 'example.com'</span></code></pre>
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<h2><code>punycode.toUnicode(domain)</code><span><a class="mark" href="#punycode_punycode_tounicode_domain" id="punycode_punycode_tounicode_domain">#</a></span></h2>
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<div class="api_metadata">
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<span>Added in: v0.6.1</span>
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</div>
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<ul>
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<li><code>domain</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a></li>
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</ul>
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<p>The <code>punycode.toUnicode()</code> method converts a string representing a domain name
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containing <a href="https://tools.ietf.org/html/rfc3492">Punycode</a> encoded characters into Unicode. Only the <a href="https://tools.ietf.org/html/rfc3492">Punycode</a>
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encoded parts of the domain name are be converted.</p>
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<pre><code class="language-js"><span class="hljs-comment">// decode domain names</span>
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punycode.toUnicode(<span class="hljs-string">'xn--maana-pta.com'</span>); <span class="hljs-comment">// 'mañana.com'</span>
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punycode.toUnicode(<span class="hljs-string">'xn----dqo34k.com'</span>); <span class="hljs-comment">// '☃-⌘.com'</span>
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punycode.toUnicode(<span class="hljs-string">'example.com'</span>); <span class="hljs-comment">// 'example.com'</span></code></pre>
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<h2><code>punycode.ucs2</code><span><a class="mark" href="#punycode_punycode_ucs2" id="punycode_punycode_ucs2">#</a></span></h2>
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<div class="api_metadata">
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<span>Added in: v0.7.0</span>
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</div>
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<h3><code>punycode.ucs2.decode(string)</code><span><a class="mark" href="#punycode_punycode_ucs2_decode_string" id="punycode_punycode_ucs2_decode_string">#</a></span></h3>
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<div class="api_metadata">
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<span>Added in: v0.7.0</span>
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</div>
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<ul>
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<li><code>string</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a></li>
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</ul>
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<p>The <code>punycode.ucs2.decode()</code> method returns an array containing the numeric
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codepoint values of each Unicode symbol in the string.</p>
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<pre><code class="language-js">punycode.ucs2.decode(<span class="hljs-string">'abc'</span>); <span class="hljs-comment">// [0x61, 0x62, 0x63]</span>
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<span class="hljs-comment">// surrogate pair for U+1D306 tetragram for centre:</span>
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punycode.ucs2.decode(<span class="hljs-string">'\uD834\uDF06'</span>); <span class="hljs-comment">// [0x1D306]</span></code></pre>
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<h3><code>punycode.ucs2.encode(codePoints)</code><span><a class="mark" href="#punycode_punycode_ucs2_encode_codepoints" id="punycode_punycode_ucs2_encode_codepoints">#</a></span></h3>
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<div class="api_metadata">
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<span>Added in: v0.7.0</span>
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</div>
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<ul>
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<li><code>codePoints</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type"><integer[]></a></li>
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</ul>
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<p>The <code>punycode.ucs2.encode()</code> method returns a string based on an array of
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numeric code point values.</p>
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<pre><code class="language-js">punycode.ucs2.encode([<span class="hljs-number">0x61</span>, <span class="hljs-number">0x62</span>, <span class="hljs-number">0x63</span>]); <span class="hljs-comment">// 'abc'</span>
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punycode.ucs2.encode([<span class="hljs-number">0x1D306</span>]); <span class="hljs-comment">// '\uD834\uDF06'</span></code></pre>
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<h2><code>punycode.version</code><span><a class="mark" href="#punycode_punycode_version" id="punycode_punycode_version">#</a></span></h2>
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<span>Added in: v0.6.1</span>
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<ul>
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<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a></li>
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<p>Returns a string identifying the current <a href="https://github.com/bestiejs/punycode.js">Punycode.js</a> version number.</p>
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