图片转base64在线生成器源码

寻梦xunm| 16| 网络收集
3小时前
本地处理，无需上传服务器 | 支持JPG、PNG、GIF、WebP等格式 | 一键复制
<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>在线图片转Base64生成器</title>
  <style>
    :root {
      --primary: #3b82f6;
      --primary-light: #60a5fa;
      --bg: #f8fafc;
      --panel: #ffffff;
      --border: #e2e8f0;
      --text: #1e293b;
      --text-light: #64748b;
      --shadow: 0 4px 12px rgba(59, 130, 246, 0.1);
      --danger: #ef4444;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: 'Inter', system-ui, -apple-system, sans-serif;
    }

    body {
      background-color: var(--bg);
      color: var(--text);
      padding: 20px;
      line-height: 1.6;
    }

    header {
      text-align: center;
      margin-bottom: 30px;
      padding: 15px 0;
    }

    h1 {
      color: var(--primary);
      margin-bottom: 8px;
      font-weight: 700;
      font-size: 2rem;
    }

    .subtitle {
      color: var(--text-light);
      font-size: 1.1rem;
      max-width: 600px;
      margin: 0 auto;
    }

    .container {
      display: flex;
      flex-wrap: wrap;
      gap: 30px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .upload-panel, .result-panel {
      flex: 1;
      min-width: 300px;
      background: var(--panel);
      border-radius: 16px;
      padding: 30px;
      box-shadow: var(--shadow);
    }

    .panel-title {
      font-size: 1.3rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .upload-area {
      border: 2px dashed var(--border);
      border-radius: 12px;
      padding: 40px 20px;
      text-align: center;
      cursor: pointer;
      transition: all 0.3s;
      margin-bottom: 25px;
    }

    .upload-area:hover {
      border-color: var(--primary-light);
      background-color: rgba(59, 130, 246, 0.03);
    }

    .upload-area.active {
      border-color: var(--primary);
      background-color: rgba(59, 130, 246, 0.05);
    }

    .upload-icon {
      font-size: 3rem;
      color: var(--primary-light);
      margin-bottom: 15px;
    }

    .upload-text {
      font-size: 1.1rem;
      margin-bottom: 10px;
    }

    .upload-hint {
      font-size: 0.9rem;
      color: var(--text-light);
      line-height: 1.5;
    }

    #file-input {
      display: none;
    }

    .preview-container {
      margin-top: 25px;
      display: none;
    }

    .preview-title {
      font-weight: 600;
      margin-bottom: 10px;
      color: var(--text);
    }

    .preview-box {
      width: 100%;
      height: 200px;
      border: 1px solid var(--border);
      border-radius: 8px;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      background-color: #f1f5f9;
    }

    .preview-img {
      max-width: 100%;
      max-height: 100%;
      object-fit: contain;
    }

    .file-info {
      margin-top: 15px;
      padding: 12px;
      background-color: #f1f5f9;
      border-radius: 8px;
      font-size: 0.9rem;
    }

    .info-item {
      display: flex;
      justify-content: space-between;
      margin-bottom: 5px;
    }

    .info-label {
      color: var(--text-light);
    }

    .settings-group {
      margin-bottom: 25px;
    }

    .settings-label {
      display: block;
      margin-bottom: 10px;
      font-weight: 600;
      color: var(--text);
    }

    select {
      width: 100%;
      padding: 12px 15px;
      border: 2px solid var(--border);
      border-radius: 8px;
      font-size: 1rem;
      transition: all 0.2s;
      background-color: white;
    }

    select:focus {
      outline: none;
      border-color: var(--primary-light);
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    }

    .btn {
      width: 100%;
      padding: 14px;
      border: none;
      border-radius: 8px;
      font-size: 1.1rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .convert-btn {
      background-color: var(--primary);
      color: white;
      margin-bottom: 15px;
    }

    .convert-btn:hover {
      background-color: #2563eb;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
    }

    .convert-btn:active {
      transform: translateY(0);
    }

    .reset-btn {
      background-color: #f8fafc;
      color: var(--text);
      border: 2px solid var(--border);
    }

    .reset-btn:hover {
      background-color: #f1f5f9;
      border-color: #cbd5e1;
    }

    .result-content {
      margin-top: 20px;
    }

    .base64-output {
      width: 100%;
      min-height: 300px;
      padding: 15px;
      border: 2px solid var(--border);
      border-radius: 8px;
      font-family: monospace;
      font-size: 0.9rem;
      resize: vertical;
      background-color: white;
      white-space: pre-wrap;
      word-break: break-all;
      overflow-y: auto;
    }

    .output-actions {
      display: flex;
      gap: 15px;
      margin-top: 15px;
    }

    .action-btn {
      flex: 1;
      padding: 10px;
      border: none;
      border-radius: 8px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s;
      font-size: 0.95rem;
    }

    .copy-btn {
      background-color: var(--primary);
      color: white;
    }

    .copy-btn:hover {
      background-color: #2563eb;
    }

    .download-btn {
      background-color: #f1f5f9;
      color: var(--text);
    }

    .download-btn:hover {
      background-color: #e2e8f0;
    }

    .notification {
      position: fixed;
      top: 20px;
      right: 20px;
      background-color: #10b981;
      color: white;
      padding: 12px 20px;
      border-radius: 8px;
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
      transform: translateX(120%);
      transition: transform 0.3s ease;
      z-index: 1000;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .notification.show {
      transform: translateX(0);
    }

    .error-notification {
      background-color: var(--danger);
    }

    .loading {
      display: none;
      text-align: center;
      padding: 20px;
    }

    .loading-spinner {
      width: 40px;
      height: 40px;
      border: 4px solid rgba(59, 130, 246, 0.1);
      border-left-color: var(--primary);
      border-radius: 50%;
      animation: spin 1s linear infinite;
      margin: 0 auto 15px;
    }

    @keyframes spin {
      to { transform: rotate(360deg); }
    }

    @media (max-width: 768px) {
      .container {
        flex-direction: column;
      }

      h1 {
        font-size: 1.8rem;
      }

      .upload-panel, .result-panel {
        padding: 25px;
      }

      .preview-box {
        height: 150px;
      }

      .base64-output {
        min-height: 250px;
      }
    }
  </style>
</head>
<body>
  <header>
    <h1>在线图片转Base64生成器</h1>
    <p class="subtitle">本地处理，无需上传服务器 | 支持JPG、PNG、GIF、WebP等格式 | 一键复制</p>
  </header>

  <div class="container">
    <div class="upload-panel">
      <h2 class="panel-title">
        <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
          <path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"></path>
          <polyline points="17 8 12 3 7 8"></polyline>
          <line x1="12" y1="3" x2="12" y2="15"></line>
        </svg>
        上传图片
      </h2>

      <!-- 上传区域 -->
      <div class="upload-area" id="upload-area">
        <div class="upload-icon">?</div>
        <div class="upload-text">点击或拖拽图片到此处上传</div>
        <div class="upload-hint">支持 JPG、PNG、GIF、WebP、BMP 格式<br>单文件最大 10MB</div>
        <input type="file" id="file-input" accept="image/*">
      </div>

      <!-- 预览区域 -->
      <div class="preview-container" id="preview-container">
        <div class="preview-title">图片预览</div>
        <div class="preview-box">
          <img src="" alt="预览图" class="preview-img" id="preview-img">
        </div>
        <div class="file-info">
          <div class="info-item">
            <span class="info-label">文件名：</span>
            <span class="info-value" id="file-name">-</span>
          </div>
          <div class="info-item">
            <span class="info-label">文件大小：</span>
            <span class="info-value" id="file-size">-</span>
          </div>
          <div class="info-item">
            <span class="info-label">尺寸：</span>
            <span class="info-value" id="file-dimensions">-</span>
          </div>
          <div class="info-item">
            <span class="info-label">格式：</span>
            <span class="info-value" id="file-format">-</span>
          </div>
        </div>
      </div>

      <!-- 设置区域 -->
      <div class="settings-group">
        <label class="settings-label" for="output-format">输出格式</label>
        <select id="output-format">
          <option value="full">完整 Base64 (带 Data URI 前缀)</option>
          <option value="pure">纯 Base64 (不含前缀)</option>
          <option value="html">HTML img 标签</option>
          <option value="css">CSS background 样式</option>
        </select>
      </div>

      <button class="btn convert-btn" id="convert-btn">
        <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
          <path d="M12 2L2 7l10 5 10-5-10-5zM2 17l10 5 10-5"></path>
          <path d="M2 12l10 5 10-5"></path>
        </svg>
        开始转换
      </button>
      <button class="btn reset-btn" id="reset-btn">重置</button>
    </div>

    <div class="result-panel">
      <h2 class="panel-title">
        <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
          <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"></path>
          <polyline points="14 2 14 8 20 8"></polyline>
          <line x1="16" y1="13" x2="8" y2="13"></line>
          <line x1="16" y1="17" x2="8" y2="17"></line>
          <polyline points="10 9 9 9 8 9"></polyline>
        </svg>
        转换结果
      </h2>

      <!-- 加载中 -->
      <div class="loading" id="loading">
        <div class="loading-spinner"></div>
        <div>转换中，请稍候...</div>
      </div>

      <!-- 结果输出 -->
      <div class="result-content" id="result-content" style="display: none;">
        <textarea class="base64-output" id="base64-output" readonly></textarea>
        <div class="output-actions">
          <button class="action-btn copy-btn" id="copy-btn">
            <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
              <rect x="9" y="9" width="13" height="13" rx="2" ry="2"></rect>
              <path d="M5 15H4a2 2 0 0 1-2-2v-4a2 2 0 0 1 2-2h1"></path>
            </svg>
            复制结果
          </button>
          <button class="action-btn download-btn" id="download-btn">
            <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
              <path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"></path>
                            <polyline points="7 10 12 15 17 10"></polyline>
              <line x1="12" y1="15" x2="12" y2="3"></line>
            </svg>
            下载 TXT
          </button>
        </div>
      </div>

      <!-- 初始提示 -->
      <div id="initial-hint" style="text-align: center; padding: 40px 20px; color: var(--text-light);">
        上传图片并点击"开始转换"按钮，生成的 Base64 代码将显示在这里
      </div>
    </div>
  </div>

  <div class="notification" id="notification">操作成功！</div>

  <script>
    // 获取DOM元素
    const uploadArea = document.getElementById('upload-area');
    const fileInput = document.getElementById('file-input');
    const previewContainer = document.getElementById('preview-container');
    const previewImg = document.getElementById('preview-img');
    const fileName = document.getElementById('file-name');
    const fileSize = document.getElementById('file-size');
    const fileDimensions = document.getElementById('file-dimensions');
    const fileFormat = document.getElementById('file-format');
    const outputFormat = document.getElementById('output-format');
    const convertBtn = document.getElementById('convert-btn');
    const resetBtn = document.getElementById('reset-btn');
    const loading = document.getElementById('loading');
    const resultContent = document.getElementById('result-content');
    const base64Output = document.getElementById('base64-output');
    const copyBtn = document.getElementById('copy-btn');
    const downloadBtn = document.getElementById('download-btn');
    const notification = document.getElementById('notification');
    const initialHint = document.getElementById('initial-hint');

    // 存储上传的文件和Base64编码
    let uploadedFile = null;
    let base64Code = '';

    // 格式化文件大小
    function formatFileSize(bytes) {
      if (bytes < 1024) return bytes + ' B';
      if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(2) + ' KB';
      return (bytes / (1024 * 1024)).toFixed(2) + ' MB';
    }

    // 显示通知
    function showNotification(message, isError = false) {
      notification.textContent = message;
      notification.className = 'notification';
      if (isError) notification.classList.add('error-notification');
      notification.classList.add('show');
      setTimeout(() => {
        notification.classList.remove('show');
      }, 2000);
    }

    // 处理图片上传
    function handleFileSelect(file) {
      if (!file) return;

      // 检查文件类型
      if (!file.type.startsWith('image/')) {
        showNotification('请上传图片文件！', true);
        return;
      }

      // 检查文件大小（最大10MB）
      const maxSize = 10 * 1024 * 1024; // 10MB
      if (file.size > maxSize) {
        showNotification(`文件过大（最大支持10MB），当前文件大小：${formatFileSize(file.size)}`, true);
        return;
      }

      uploadedFile = file;

      // 更新文件信息
      fileName.textContent = file.name;
      fileSize.textContent = formatFileSize(file.size);
      fileFormat.textContent = file.type.split('/')[1].toUpperCase();

      // 预览图片并获取尺寸
      const reader = new FileReader();
      reader.onload = function(e) {
        const img = new Image();
        img.onload = function() {
          fileDimensions.textContent = `${img.width} × ${img.height} px`;
          previewImg.src = e.target.result;
          previewContainer.style.display = 'block';
        };
        img.src = e.target.result;
      };
      reader.readAsDataURL(file);

      // 显示上传区域激活状态
      uploadArea.classList.add('active');
      setTimeout(() => {
        uploadArea.classList.remove('active');
      }, 500);
    }

    // 转换图片为Base64
    function convertToBase64() {
      if (!uploadedFile) {
        showNotification('请先上传图片！', true);
        return;
      }

      // 显示加载状态
      loading.style.display = 'block';
      resultContent.style.display = 'none';
      initialHint.style.display = 'none';

      // 读取文件并转换
      const reader = new FileReader();
      reader.onload = function(e) {
        base64Code = e.target.result;
        formatOutput(base64Code);

        // 隐藏加载状态，显示结果
        setTimeout(() => {
          loading.style.display = 'none';
          resultContent.style.display = 'block';
        }, 300);
      };
      reader.readAsDataURL(uploadedFile);
    }

    // 格式化输出结果
    function formatOutput(base64) {
      const format = outputFormat.value;
      let output = '';

      switch (format) {
        case 'full':
          output = base64;
          break;
        case 'pure':
          // 移除Data URI前缀
          output = base64.split(',')[1];
          break;
        case 'html':
          output = `<img src="${base64}" alt="图片" />`;
          break;
        case 'css':
          output = `background-image: url("${base64}");`;
          break;
      }

      base64Output.value = output;
    }

    // 复制结果到剪贴板
    function copyToClipboard() {
      if (!base64Code) {
        showNotification('暂无转换结果可复制！', true);
        return;
      }

      base64Output.select();
      document.execCommand('copy');
      showNotification('复制成功！');
    }

    // 下载Base64为TXT文件
    function downloadAsTxt() {
      if (!base64Code) {
        showNotification('暂无转换结果可下载！', true);
        return;
      }

      const blob = new Blob([base64Output.value], { type: 'text/plain' });
      const url = URL.createObjectURL(blob);
      const a = document.createElement('a');
      a.href = url;
      a.download = `base64_${uploadedFile.name.split('.')[0]}.txt`;
      document.body.appendChild(a);
      a.click();
      document.body.removeChild(a);
      URL.revokeObjectURL(url);

      showNotification('下载已开始！');
    }

    // 重置所有状态
    function resetAll() {
      uploadedFile = null;
      base64Code = '';
      fileInput.value = '';
      previewContainer.style.display = 'none';
      previewImg.src = '';
      fileName.textContent = '-';
      fileSize.textContent = '-';
      fileDimensions.textContent = '-';
      fileFormat.textContent = '-';
      base64Output.value = '';
      resultContent.style.display = 'none';
      loading.style.display = 'none';
      initialHint.style.display = 'block';
      showNotification('已重置！');
    }

    // 事件监听 - 点击上传区域
    uploadArea.addEventListener('click', () => {
      fileInput.click();
    });

    // 事件监听 - 选择文件
    fileInput.addEventListener('change', (e) => {
      if (e.target.files.length > 0) {
        handleFileSelect(e.target.files[0]);
      }
    });

    // 事件监听 - 拖拽上传
    uploadArea.addEventListener('dragover', (e) => {
      e.preventDefault();
      uploadArea.classList.add('active');
    });

    uploadArea.addEventListener('dragleave', () => {
      uploadArea.classList.remove('active');
    });

    uploadArea.addEventListener('drop', (e) => {
      e.preventDefault();
      uploadArea.classList.remove('active');
      if (e.dataTransfer.files.length > 0) {
        handleFileSelect(e.dataTransfer.files[0]);
      }
    });

    // 事件监听 - 转换按钮
    convertBtn.addEventListener('click', convertToBase64);

    // 事件监听 - 重置按钮
    resetBtn.addEventListener('click', resetAll);

    // 事件监听 - 输出格式变更
    outputFormat.addEventListener('change', () => {
      if (base64Code) {
        formatOutput(base64Code);
      }
    });

    // 事件监听 - 复制按钮
    copyBtn.addEventListener('click', copyToClipboard);

    // 事件监听 - 下载按钮
    downloadBtn.addEventListener('click', downloadAsTxt);
  </script>
</body>
</html>
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