bip39/index.html at master · JesusValeraDev/bip39 · GitHub

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<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="format-detection" content="telephone=no, date=no, address=no, email=no">

  <title>BIP39 Word Selector - Bidirectional Bitcoin Mnemonic Tool</title>
  <meta name="description" content="Free online BIP39 word selector tool for Bitcoin. Type words or click numbers - bidirectional converter between BIP39 words and binary patterns. Supports 10 languages. Privacy-focused, runs entirely in your browser.">
  <meta name="keywords" content="BIP39 tool, online BIP39, BIP39 word selector, Bitcoin tool, crypto tool, mnemonic tool, seed phrase tool, free BIP39 converter, online mnemonic generator, BIP39 online, Bitcoin mnemonic, cryptocurrency tool, wallet tool, BIP39 calculator, word list tool, binary converter, bidirectional converter, word to binary, binary to word, blockchain tool, HD wallet tool, crypto converter online, free crypto tool, no registration">
  <meta name="author" content="JesusValeraDev">
  <meta name="theme-color" content="#f7931a">
  <meta name="application-name" content="BIP39 Online Tool">
  <meta name="apple-mobile-web-app-title" content="BIP39 Tool">
  <meta name="apple-mobile-web-app-capable" content="yes">
  <meta name="mobile-web-app-capable" content="yes">
  <meta name="robots" content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1">
  <link rel="canonical" href="https://bip39.jesusvalera.dev/">

  <meta property="og:type" content="website">
  <meta property="og:url" content="https://bip39.jesusvalera.dev/">
  <meta property="og:title" content="BIP39 Word Selector - Bidirectional Bitcoin Mnemonic Tool">
  <meta property="og:description" content="Free online BIP39 tool for Bitcoin. Type words or click numbers - bidirectional converter. Supports 10 languages. Privacy-focused, runs entirely in your browser.">
  <meta property="og:image" content="https://bip39.jesusvalera.dev/favicon.svg">

  <meta property="twitter:card" content="summary">
  <meta property="twitter:url" content="https://bip39.jesusvalera.dev/">
  <meta property="twitter:title" content="BIP39 Word Selector - Bidirectional Bitcoin Tool">
  <meta property="twitter:description" content="Free online BIP39 tool. Type words or click numbers - bidirectional converter. Supports 10 languages. Privacy-focused, runs in your browser.">
  <meta property="twitter:image" content="https://bip39.jesusvalera.dev/favicon.svg">
  <script>
    // Apply theme immediately to prevent flash
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      const theme = savedTheme || getOSTheme();
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  <style>
    /* Critical CSS to prevent flash */
    :root {
      --background: #121212;
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    [data-theme="light"] {
      --background: #fafafa;
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      transition: none !important;
    }
    html {
      background: var(--background);
    }
  </style>
  <link rel="stylesheet" href="/src/styles/style.css">
  <link rel="icon" type="image/svg+xml" href="/favicon.svg">

  <script type="application/ld+json">
  {
    "@context": "https://schema.org",
    "@type": "WebApplication",
    "name": "BIP39 Word Selector",
    "description": "Free online BIP39 word selector tool for Bitcoin. Bidirectional converter - type words or click numbers to find BIP39 mnemonics",
    "url": "https://bip39.jesusvalera.dev/",
    "applicationCategory": "UtilityApplication",
    "author": {
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    "inLanguage": ["en", "es", "fr", "it", "pt", "zh", "ja", "ko", "cs"]
  }
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</head>
<body>
  <main id="main-content" class="container" aria-label="BIP39 Word Selector">
    <div class="top-controls">
      <div class="title-section">
        <h1 id="title">BIP39 Word Selector</h1>
      </div>

      <div class="controls-right">
        <button id="learn-more-btn" class="learn-more-btn" aria-label="Learn about BIP39" type="button" title="Learn about BIP39">
          <svg width="35" height="35" role="img" aria-label="Help icon">
            <title></title><use href="/sprite.svg#icon-help"/></svg>
        </button>

        <button id="language-toggle" class="language-toggle" aria-label="Select language" aria-expanded="false">
          <svg id="current-flag" class="flag-icon" width="28" height="28"><use href="/sprite.svg#flag-uk"/></svg>
        </button>

        <button id="theme-toggle" class="theme-toggle" aria-label="Toggle theme" aria-pressed="false">
          <svg class="sun-icon" width="20" height="20"><use href="/sprite.svg#icon-sun"/></svg>
          <svg class="moon-icon" width="20" height="20"><use href="/sprite.svg#icon-moon"/></svg>
        </button>
      </div>

      <div id="language-dropdown" class="language-dropdown" role="menu" aria-label="Language selection">
        <button class="language-option" data-lang="english" role="menuitem" aria-label="English">
          <svg class="flag-icon" width="32" height="32"><use href="/sprite.svg#flag-uk"/></svg>
        </button>
        <button class="language-option" data-lang="spanish" role="menuitem" aria-label="Español">
          <svg class="flag-icon" width="32" height="32"><use href="/sprite.svg#flag-es"/></svg>
        </button>
        <button class="language-option" data-lang="french" role="menuitem" aria-label="Français">
          <svg class="flag-icon" width="32" height="32"><use href="/sprite.svg#flag-fr"/></svg>
        </button>
        <button class="language-option" data-lang="italian" role="menuitem" aria-label="Italiano">
          <svg class="flag-icon" width="32" height="32"><use href="/sprite.svg#flag-it"/></svg>
        </button>
        <button class="language-option" data-lang="portuguese" role="menuitem" aria-label="Português">
          <svg class="flag-icon" width="32" height="32"><use href="/sprite.svg#flag-pt"/></svg>
        </button>
        <button class="language-option" data-lang="czech" role="menuitem" aria-label="Čeština">
          <svg class="flag-icon" width="32" height="32"><use href="/sprite.svg#flag-cz"/></svg>
        </button>
        <button class="language-option" data-lang="japanese" role="menuitem" aria-label="日本語">
          <svg class="flag-icon" width="32" height="32"><use href="/sprite.svg#flag-jp"/></svg>
        </button>
        <button class="language-option" data-lang="korean" role="menuitem" aria-label="한국어">
          <svg class="flag-icon" width="32" height="32"><use href="/sprite.svg#flag-kr"/></svg>
        </button>
        <button class="language-option" data-lang="chinese_simplified" role="menuitem" aria-label="中文 (简体)">
          <svg class="flag-icon" width="32" height="32"><use href="/sprite.svg#flag-cn"/></svg>
        </button>
        <button class="language-option" data-lang="chinese_traditional" role="menuitem" aria-label="中文 (繁體)">
          <svg class="flag-icon" width="32" height="32"><use href="/sprite.svg#flag-tw"/></svg>
        </button>
      </div>
    </div>

    <h2 id="info-text" class="info-description">Choose a BIP39 word by typing it in the input field below or by clicking the number boxes (1-2048)</h2>

    <!-- Word Input/Display Section -->
    <section class="word-section" role="region" aria-label="Word input">
      <div class="word-input-wrapper">
        <input
          type="text"
          id="word-input"
          class="word-input"
          placeholder=""
          autocomplete="off"
          spellcheck="false"
          autofocus
          aria-autocomplete="list"
          aria-controls="word-suggestions"
          aria-live="polite"
        />
        <button
          id="clear-input-btn"
          class="clear-input-btn"
          type="button"
          aria-label="Clear input"
          disabled
          aria-disabled="true"
        >
          <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
            <line x1="18" y1="6" x2="6" y2="18"></line>
            <line x1="6" y1="6" x2="18" y2="18"></line>
          </svg>
        </button>
        <div id="word-suggestions" class="word-suggestions" role="listbox" aria-label="Word suggestions" hidden></div>
      </div>
      <div class="word-info">
        <span class="word-index" aria-label="Word index"><span id="index-label">Index:</span> <span id="index">-</span> / 2048</span>
      </div>
    </section>

    <!-- Grid Selector -->
    <section class="grid-section" role="group" aria-label="Binary pattern selector">
      <div id="grid" class="grid" role="group" aria-label="Clickable binary boxes"></div>
      <div class="binary-display">
        <code id="binary" aria-label="Current binary pattern">○○○○○○○○○○○○</code>
      </div>
    </section>

    <!-- Reset Button -->
    <button id="reset" class="reset-button" aria-label="Reset all selected boxes">Reset</button>

    <!-- Privacy Info -->
    <section class="privacy-warning" role="complementary" aria-label="Privacy information">
      <div class="warning-icon">
        <svg width="48" height="48"><use href="/sprite.svg#icon-lock-closed"/></svg>
      </div>
      <div class="warning-content">
        <strong class="warning-title"></strong>
        <p id="privacy-text"></p>
      </div>
    </section>

    <div id="sr-announcements" class="sr-only" role="status" aria-live="polite" aria-atomic="true"></div>
  </main>

  <footer class="footer">
    <p>© <span id="current-year">2026</span> <a href="https://jesusvalera.dev" target="_blank" rel="noopener noreferrer">JesusValeraDev</a> · <a href="https://github.com/JesusValeraDev/bip39" target="_blank" rel="noopener noreferrer">GitHub</a> (<span id="git-hash">loading...</span>)</p>
  </footer>

  <!-- Learn More Modal -->
  <div id="learn-modal" class="modal" role="dialog" aria-labelledby="modal-title" aria-modal="true" hidden>
    <div class="modal-overlay" aria-hidden="true"></div>
    <div class="modal-content">
      <div class="modal-header">
        <h2 id="modal-title"></h2>
        <button id="modal-close" class="modal-close" aria-label="Close modal" type="button">
          <svg width="24" height="24"><use href="/sprite.svg#icon-close"/></svg>
        </button>
      </div>

      <div class="modal-body">
        <div class="modal-section">
          <div class="modal-step">
            <div class="step-number">1</div>
            <div class="step-content">
              <h3 id="modal-step1-title"></h3>
              <p id="modal-step1-text"></p>
              <div class="visual-example">
                <div id="modal-step1-word-grid" class="word-grid-example"></div>
              </div>
            </div>
          </div>
        </div>

        <div class="modal-arrow">↓</div>

        <div class="modal-section">
          <div class="modal-step">
            <div class="step-number">2</div>
            <div class="step-content">
              <h3 id="modal-step2-title"></h3>
              <p id="modal-step2-text"></p>
              <div class="visual-example">
                <div class="binary-conversion">
                  <div class="conversion-item">
                    <span id="modal-step2-word1" class="word-label"></span>
                    <span class="arrow">→</span>
                    <span class="binary-value">00000000001</span>
                  </div>
                  <div class="conversion-item">
                    <span id="modal-step2-word2" class="word-label"></span>
                    <span class="arrow">→</span>
                    <span class="binary-value">00000000010</span>
                  </div>
                  <div class="conversion-dots">...</div>
                  <div class="big-number">
                    <code id="modal-step2-entropy"></code>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>

        <div class="modal-arrow">↓</div>

        <div class="modal-section">
          <div class="modal-step">
            <div class="step-number">3</div>
            <div class="step-content">
              <h3 id="modal-step3-title"></h3>
              <p id="modal-step3-text"></p>
              <div class="visual-example">
                <div class="key-derivation">
                  <div class="derivation-box">
                    <div class="box-title" id="modal-step3-master-seed"></div>
                    <div class="box-content" id="modal-step3-bit-value"></div>
                  </div>
                  <div class="derivation-arrow">→</div>
                  <div class="derivation-box">
                    <div class="box-title" id="modal-step4-private-key1"></div>
                    <div class="box-content" id="modal-step4-bit-size1"></div>
                  </div>
                  <div class="derivation-box">
                    <div class="box-title" id="modal-step4-private-key2"></div>
                    <div class="box-content" id="modal-step4-bit-size2"></div>
                  </div>
                  <div class="derivation-box">
                    <div class="box-title" id="modal-step4-private-key3"></div>
                    <div class="box-content" id="modal-step4-bit-size3"></div>
                  </div>
                  <div class="derivation-dots">...</div>
                </div>
              </div>
            </div>
          </div>
        </div>

        <div class="modal-arrow">↓</div>

        <div class="modal-section">
          <div class="modal-step">
            <div class="step-number">4</div>
            <div class="step-content">
              <h3 id="modal-step4-title"></h3>
              <p id="modal-step4-text"></p>
              <div class="visual-example">
                <div class="address-generation">
                  <div class="address-flow">
                    <div class="flow-item">
                      <div class="flow-icon">
                        <svg width="32" height="32"><use href="/sprite.svg#icon-key"/></svg>
                      </div>
                      <div id="modal-step4-private-key" class="flow-label"></div>
                    </div>
                    <span class="flow-arrow">→</span>
                    <div class="flow-item">
                      <div class="flow-icon">
                        <svg width="32" height="32"><use href="/sprite.svg#icon-lock-open"/></svg>
                      </div>
                      <div id="modal-step4-public-key" class="flow-label"></div>
                    </div>
                    <span class="flow-arrow">→</span>
                    <div class="flow-item">
                      <div class="flow-icon">
                        <svg width="32" height="32"><use href="/sprite.svg#icon-mailbox"/></svg>
                      </div>
                      <div id="modal-step4-address" class="flow-label"></div>
                    </div>
                  </div>
                  <div class="address-example">
                    <code>bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh</code>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>

        <div class="modal-section highlight">
          <div class="modal-step">
            <div class="step-icon">
              <svg width="48" height="48"><use href="/sprite.svg#icon-warning"/></svg>
            </div>
            <div class="step-content">
              <h3 id="modal-warning-title"></h3>
              <p id="modal-warning-text"></p>
              <ul>
                <li id="modal-warning-item1"></li>
                <li id="modal-warning-item2"></li>
                <li id="modal-warning-item3"></li>
                <li id="modal-warning-item4"></li>
              </ul>
            </div>
          </div>
        </div>

        <div class="modal-section info-box">
          <h3 id="modal-why-title"></h3>
          <p id="modal-why-text"></p>
          <p class="bip39-link">
            <a id="modal-why-link" href="https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki" target="_blank" rel="noopener noreferrer"></a>
          </p>
        </div>
      </div>
    </div>
  </div>

  <script type="module" src="/src/main.ts"></script>
</body>
</html>