{"id":12433,"date":"2025-11-28T16:04:57","date_gmt":"2025-11-28T07:04:57","guid":{"rendered":"https:\/\/rakkoserver.com\/plus\/?p=11970"},"modified":"2025-11-28T16:04:57","modified_gmt":"2025-11-28T07:04:57","slug":"tool-base64-image-converter","status":"publish","type":"post","link":"https:\/\/rakkokeyword.com\/techo\/tool-base64-image-converter\/","title":{"rendered":"Base64\u753b\u50cf\u30a8\u30f3\u30b3\u30fc\u30c9\/\u30c7\u30b3\u30fc\u30c9\u30c4\u30fc\u30eb"},"content":{"rendered":"\n<!-- Base64\u753b\u50cf\u30a8\u30f3\u30b3\u30fc\u30c9\u30c4\u30fc\u30eb -->\n<div id=\"b64img-tool-container\" style=\"width: 100%; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;\">\n  <style>\n    #b64img-tool-container * {\n      box-sizing: border-box;\n    }\n    \n    #b64img-tool-container {\n      color: #333;\n      line-height: 1.6;\n    }\n    \n    \/* \u30bf\u30d6 *\/\n    .b64img-tabs {\n      display: flex;\n      gap: 0;\n      margin-bottom: 24px;\n      border-bottom: 2px solid #ddd;\n    }\n    \n    .b64img-tab {\n      flex: 1;\n      padding: 12px 20px;\n      background: #f8f8f8;\n      border: none;\n      border-bottom: 3px solid transparent;\n      cursor: pointer;\n      font-size: 15px;\n      font-weight: 500;\n      color: #666;\n      transition: all 0.3s;\n      margin-bottom: -2px;\n    }\n    \n    .b64img-tab:hover {\n      background: #f0f0f0;\n      color: #333;\n    }\n    \n    .b64img-tab:focus {\n      outline: 2px solid #13284B;\n      outline-offset: -2px;\n    }\n    \n    .b64img-tab.b64img-active {\n      background: white;\n      color: #13284B;\n      border-bottom-color: #13284B;\n      font-weight: 600;\n    }\n    \n    .b64img-tab-content {\n      display: none;\n    }\n    \n    .b64img-tab-content.b64img-active {\n      display: block;\n    }\n    \n    \/* \u30c7\u30b3\u30fc\u30c9\u7528\u30b9\u30bf\u30a4\u30eb *\/\n    .b64img-decode-input-area {\n      margin-bottom: 20px;\n    }\n    \n    .b64img-decode-textarea {\n      width: 100%;\n      min-height: 150px;\n      padding: 12px;\n      border: 2px solid #ccc;\n      border-radius: 4px;\n      font-family: 'Courier New', monospace;\n      font-size: 12px;\n      resize: vertical;\n      transition: border-color 0.3s;\n    }\n    \n    .b64img-decode-textarea:focus {\n      outline: none;\n      border-color: #13284B;\n    }\n    \n    .b64img-decode-btn {\n      width: 100%;\n      padding: 12px;\n      background: #13284B;\n      color: white;\n      border: none;\n      border-radius: 4px;\n      cursor: pointer;\n      font-size: 14px;\n      font-weight: 500;\n      transition: opacity 0.3s;\n      margin-top: 12px;\n    }\n    \n    .b64img-decode-btn:hover {\n      opacity: 0.9;\n    }\n    \n    .b64img-decode-btn:focus {\n      outline: 2px solid #13284B;\n      outline-offset: 2px;\n    }\n    \n    .b64img-decode-result {\n      display: none;\n    }\n    \n    .b64img-decode-result.b64img-active {\n      display: block;\n    }\n    \n    .b64img-download-btn {\n      width: 100%;\n      padding: 12px;\n      background: #27ae60;\n      color: white;\n      border: none;\n      border-radius: 4px;\n      cursor: pointer;\n      font-size: 14px;\n      font-weight: 500;\n      transition: opacity 0.3s;\n      margin-top: 12px;\n    }\n    \n    .b64img-download-btn:hover {\n      opacity: 0.9;\n    }\n    \n    .b64img-download-btn:focus {\n      outline: 2px solid #27ae60;\n      outline-offset: 2px;\n    }\n    \n    .b64img-section {\n      margin-bottom: 24px;\n    }\n    \n    .b64img-section-title {\n      font-size: 16px;\n      font-weight: 600;\n      margin: 0 0 12px 0;\n      color: #222;\n    }\n    \n    \/* \u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u30a8\u30ea\u30a2 *\/\n    .b64img-upload-area {\n      background: #f8f8f8;\n      border: 2px dashed #ccc;\n      border-radius: 8px;\n      padding: 40px 20px;\n      text-align: center;\n      cursor: pointer;\n      transition: all 0.3s;\n      position: relative;\n    }\n    \n    .b64img-upload-area:hover {\n      background: #f0f0f0;\n      border-color: #999;\n    }\n    \n    .b64img-upload-area:focus-within {\n      outline: 2px solid #13284B;\n      outline-offset: 2px;\n    }\n    \n    .b64img-upload-area.b64img-dragover {\n      background: #e8f4f8;\n      border-color: #13284B;\n    }\n    \n    .b64img-upload-icon {\n      display: none;\n    }\n    \n    .b64img-upload-text {\n      font-size: 14px;\n      color: #666;\n      margin: 8px 0;\n    }\n    \n    .b64img-upload-hint {\n      font-size: 12px;\n      color: #999;\n    }\n    \n    #b64img-file-input {\n      display: none;\n    }\n    \n    \/* \u30ed\u30fc\u30c7\u30a3\u30f3\u30b0 *\/\n    .b64img-loading {\n      display: none;\n      position: absolute;\n      top: 0;\n      left: 0;\n      right: 0;\n      bottom: 0;\n      background: rgba(255, 255, 255, 0.9);\n      align-items: center;\n      justify-content: center;\n      border-radius: 8px;\n    }\n    \n    .b64img-loading.b64img-active {\n      display: flex;\n    }\n    \n    .b64img-spinner {\n      width: 40px;\n      height: 40px;\n      border: 4px solid #f3f3f3;\n      border-top: 4px solid #13284B;\n      border-radius: 50%;\n      animation: b64img-spin 1s linear infinite;\n    }\n    \n    @keyframes b64img-spin {\n      0% { transform: rotate(0deg); }\n      100% { transform: rotate(360deg); }\n    }\n    \n    \/* \u30aa\u30d7\u30b7\u30e7\u30f3\u8a2d\u5b9a *\/\n    .b64img-options {\n      margin-top: 16px;\n    }\n    \n    .b64img-options-toggle {\n      background: none;\n      border: none;\n      color: #13284B;\n      cursor: pointer;\n      font-size: 14px;\n      padding: 8px 0;\n      text-decoration: underline;\n      display: inline-flex;\n      align-items: center;\n      gap: 4px;\n    }\n    \n    .b64img-options-toggle:hover {\n      opacity: 0.8;\n    }\n    \n    .b64img-options-toggle:focus {\n      outline: 2px solid #13284B;\n      outline-offset: 2px;\n    }\n    \n    .b64img-options-panel {\n      display: none;\n      margin-top: 12px;\n      padding: 16px;\n      background: #f8f8f8;\n      border-radius: 4px;\n    }\n    \n    .b64img-options-panel.b64img-active {\n      display: block;\n    }\n    \n    .b64img-option-row {\n      margin-bottom: 16px;\n    }\n    \n    .b64img-option-row:last-child {\n      margin-bottom: 0;\n    }\n    \n    .b64img-option-label {\n      display: block;\n      font-size: 13px;\n      font-weight: 500;\n      margin-bottom: 6px;\n      color: #444;\n    }\n    \n    .b64img-option-input {\n      width: 100%;\n      padding: 8px 12px;\n      border: 1px solid #ccc;\n      border-radius: 4px;\n      font-size: 14px;\n    }\n    \n    .b64img-option-input:focus {\n      outline: none;\n      border-color: #13284B;\n    }\n    \n    .b64img-quality-display {\n      display: inline-block;\n      margin-left: 8px;\n      font-weight: 600;\n      color: #13284B;\n    }\n    \n    \/* \u30ea\u30b5\u30a4\u30ba\u30dc\u30bf\u30f3\u30a8\u30ea\u30a2 *\/\n    .b64img-resize-controls {\n      display: none;\n      margin-top: 12px;\n      padding-top: 12px;\n      border-top: 1px solid #ddd;\n    }\n    \n    .b64img-resize-controls.b64img-active {\n      display: block;\n    }\n    \n    .b64img-resize-toggle-btn {\n      width: 100%;\n      padding: 10px 16px;\n      background: none;\n      color: #13284B;\n      border: none;\n      cursor: pointer;\n      font-size: 14px;\n      font-weight: 500;\n      text-align: left;\n      display: flex;\n      align-items: center;\n      gap: 8px;\n      transition: opacity 0.3s;\n    }\n    \n    .b64img-resize-toggle-btn:hover {\n      opacity: 0.8;\n    }\n    \n    .b64img-resize-toggle-btn:focus {\n      outline: 2px solid #13284B;\n      outline-offset: 2px;\n    }\n    \n    .b64img-resize-icon {\n      font-size: 12px;\n      transition: transform 0.3s;\n    }\n    \n    .b64img-resize-icon.b64img-expanded {\n      transform: rotate(90deg);\n    }\n    \n    .b64img-resize-panel {\n      display: none;\n      margin-top: 12px;\n      padding: 16px;\n      background: #f8f8f8;\n      border-radius: 4px;\n    }\n    \n    .b64img-resize-panel.b64img-active {\n      display: block;\n    }\n    \n    .b64img-apply-resize-btn {\n      width: 100%;\n      padding: 10px 16px;\n      background: #13284B;\n      color: white;\n      border: none;\n      border-radius: 4px;\n      cursor: pointer;\n      font-size: 14px;\n      font-weight: 500;\n      transition: opacity 0.3s;\n      margin-top: 12px;\n    }\n    \n    .b64img-apply-resize-btn:hover {\n      opacity: 0.9;\n    }\n    \n    .b64img-apply-resize-btn:focus {\n      outline: 2px solid #13284B;\n      outline-offset: 2px;\n    }\n    \n    .b64img-resizing-message {\n      display: none;\n      text-align: center;\n      padding: 20px;\n      color: #666;\n    }\n    \n    .b64img-resizing-message.b64img-active {\n      display: block;\n    }\n    \n    .b64img-resizing-text {\n      font-size: 14px;\n      margin-bottom: 12px;\n    }\n    \n    .b64img-resizing-dots {\n      display: inline-block;\n    }\n    \n    .b64img-resizing-dots::after {\n      content: '...';\n      animation: b64img-dots 1.5s steps(4, end) infinite;\n    }\n    \n    @keyframes b64img-dots {\n      0%, 20% { content: '.'; }\n      40% { content: '..'; }\n      60%, 100% { content: '...'; }\n    }\n    \n    .b64img-reset-btn {\n      display: none;\n      width: 100%;\n      padding: 8px 16px;\n      background: #666;\n      color: white;\n      border: none;\n      border-radius: 4px;\n      cursor: pointer;\n      font-size: 13px;\n      font-weight: 500;\n      transition: opacity 0.3s;\n      margin-top: 8px;\n    }\n    \n    .b64img-reset-btn.b64img-active {\n      display: block;\n    }\n    \n    .b64img-reset-btn:hover {\n      opacity: 0.9;\n    }\n    \n    .b64img-reset-btn:focus {\n      outline: 2px solid #666;\n      outline-offset: 2px;\n    }\n    \n    \/* \u7d50\u679c\u30a8\u30ea\u30a2 *\/\n    .b64img-result {\n      display: none;\n    }\n    \n    .b64img-result.b64img-active {\n      display: block;\n    }\n    \n    \/* \u30d7\u30ec\u30d3\u30e5\u30fc\u30a8\u30ea\u30a2 *\/\n    .b64img-preview-area {\n      background: #f8f8f8;\n      border-radius: 4px;\n      padding: 16px;\n      margin-bottom: 20px;\n    }\n    \n    .b64img-preview-wrapper {\n      max-height: 400px;\n      overflow: hidden;\n      display: flex;\n      align-items: center;\n      justify-content: center;\n      margin-bottom: 16px;\n      background: #fff;\n      border-radius: 4px;\n    }\n    \n    .b64img-preview-img {\n      max-width: 100%;\n      max-height: 400px;\n      height: auto;\n      display: block;\n      border-radius: 4px;\n    }\n    \n    .b64img-file-info {\n      font-size: 13px;\n      color: #666;\n    }\n    \n    .b64img-file-info-row {\n      display: flex;\n      justify-content: space-between;\n      margin-bottom: 6px;\n      flex-wrap: wrap;\n      gap: 8px;\n    }\n    \n    .b64img-file-info-label {\n      font-weight: 500;\n      color: #444;\n    }\n    \n    .b64img-file-info-value {\n      color: #666;\n    }\n    \n    .b64img-size-large {\n      color: #d63031;\n      font-weight: 600;\n    }\n    \n    \/* \u30b3\u30fc\u30c9\u51fa\u529b *\/\n    .b64img-code-section {\n      margin-bottom: 20px;\n    }\n    \n    .b64img-code-title {\n      font-size: 14px;\n      font-weight: 600;\n      margin: 0 0 8px 0;\n      color: #444;\n    }\n    \n    .b64img-code-wrapper {\n      position: relative;\n    }\n    \n    .b64img-code-area {\n      width: 100%;\n      padding: 12px 80px 12px 12px;\n      background: #f8f8f8;\n      border: 1px solid #ddd;\n      border-radius: 4px;\n      font-family: 'Courier New', monospace;\n      font-size: 12px;\n      resize: vertical;\n      min-height: 80px;\n      color: #333;\n    }\n    \n    .b64img-code-area:focus {\n      outline: none;\n      border-color: #13284B;\n    }\n    \n    .b64img-copy-btn {\n      position: absolute;\n      top: 8px;\n      right: 8px;\n      padding: 6px 12px;\n      background: #13284B;\n      color: white;\n      border: none;\n      border-radius: 4px;\n      cursor: pointer;\n      font-size: 12px;\n      font-weight: 500;\n      transition: opacity 0.3s;\n    }\n    \n    .b64img-copy-btn:hover {\n      opacity: 0.9;\n    }\n    \n    .b64img-copy-btn:focus {\n      outline: 2px solid #13284B;\n      outline-offset: 2px;\n    }\n    \n    .b64img-copy-btn.b64img-copied {\n      background: #27ae60;\n    }\n    \n    \/* \u30af\u30ea\u30a2\u30dc\u30bf\u30f3 *\/\n    .b64img-clear-btn {\n      width: 100%;\n      padding: 12px;\n      background: #666;\n      color: white;\n      border: none;\n      border-radius: 4px;\n      cursor: pointer;\n      font-size: 14px;\n      font-weight: 500;\n      transition: background 0.3s;\n    }\n    \n    .b64img-clear-btn:hover {\n      background: #555;\n    }\n    \n    .b64img-clear-btn:focus {\n      outline: 2px solid #666;\n      outline-offset: 2px;\n    }\n    \n    \/* \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8 *\/\n    .b64img-error {\n      background: #ffe0e0;\n      color: #d63031;\n      padding: 12px;\n      border-radius: 4px;\n      margin-bottom: 16px;\n      font-size: 14px;\n      display: none;\n    }\n    \n    .b64img-error.b64img-active {\n      display: block;\n    }\n    \n    \/* \u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc *\/\n    @media (max-width: 480px) {\n      .b64img-upload-area {\n        padding: 30px 15px;\n      }\n      \n      .b64img-upload-icon {\n        font-size: 36px;\n      }\n      \n      .b64img-code-area {\n        font-size: 11px;\n        min-height: 60px;\n        padding-right: 70px;\n      }\n      \n      .b64img-file-info-row {\n        font-size: 12px;\n      }\n      \n      .b64img-copy-btn {\n        padding: 5px 8px;\n        font-size: 11px;\n      }\n    }\n  <\/style>\n\n  <!-- \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8 -->\n  <div id=\"b64img-error\" class=\"b64img-error\" role=\"alert\"><\/div>\n\n  <!-- \u30bf\u30d6 -->\n  <div class=\"b64img-tabs\" role=\"tablist\">\n    <button id=\"b64img-tab-encode\" class=\"b64img-tab b64img-active\" role=\"tab\" aria-selected=\"true\" aria-controls=\"b64img-encode-content\">\u30a8\u30f3\u30b3\u30fc\u30c9\uff08\u753b\u50cf\u2192Base64\uff09<\/button>\n    <button id=\"b64img-tab-decode\" class=\"b64img-tab\" role=\"tab\" aria-selected=\"false\" aria-controls=\"b64img-decode-content\">\u30c7\u30b3\u30fc\u30c9\uff08Base64\u2192\u753b\u50cf\uff09<\/button>\n  <\/div>\n\n  <!-- \u30a8\u30f3\u30b3\u30fc\u30c9\u30bf\u30d6\u30b3\u30f3\u30c6\u30f3\u30c4 -->\n  <div id=\"b64img-encode-content\" class=\"b64img-tab-content b64img-active\" role=\"tabpanel\" aria-labelledby=\"b64img-tab-encode\">\n    <!-- \u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u30a8\u30ea\u30a2 -->\n    <div class=\"b64img-section\">\n      <div id=\"b64img-upload-area\" class=\"b64img-upload-area\" role=\"button\" tabindex=\"0\" aria-label=\"\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u3092\u9078\u629e\">\n        <div class=\"b64img-upload-text\">\u3053\u3053\u306b\u753b\u50cf\u3092\u30c9\u30e9\u30c3\u30b0&amp;\u30c9\u30ed\u30c3\u30d7<\/div>\n        <div class=\"b64img-upload-text\">\u307e\u305f\u306f<\/div>\n        <div class=\"b64img-upload-text\" style=\"color: #13284B; font-weight: 600;\">\u30af\u30ea\u30c3\u30af\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u9078\u629e<\/div>\n        <div class=\"b64img-upload-hint\">\u5bfe\u5fdc\u5f62\u5f0f: JPG, PNG, GIF, WEBP (\u6700\u59275MB)<\/div>\n        <div class=\"b64img-loading\">\n          <div class=\"b64img-spinner\"><\/div>\n        <\/div>\n      <\/div>\n      <input type=\"file\" id=\"b64img-file-input\" accept=\"image\/jpeg,image\/png,image\/gif,image\/webp\" aria-label=\"\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u9078\u629e\">\n    <\/div>\n\n    <!-- \u7d50\u679c\u30a8\u30ea\u30a2 -->\n    <div id=\"b64img-result\" class=\"b64img-result\">\n    <!-- \u30d7\u30ec\u30d3\u30e5\u30fc\u3068\u30d5\u30a1\u30a4\u30eb\u60c5\u5831 -->\n    <div class=\"b64img-section\">\n      <p class=\"b64img-section-title\">\u30d7\u30ec\u30d3\u30e5\u30fc\u3068\u30d5\u30a1\u30a4\u30eb\u60c5\u5831<\/p>\n      <div class=\"b64img-preview-area\">\n        <div class=\"b64img-preview-wrapper\">\n          <img id=\"b64img-preview-img\" class=\"b64img-preview-img\" alt=\"\u5909\u63db\u5f8c\u306e\u753b\u50cf\u30d7\u30ec\u30d3\u30e5\u30fc\">\n        <\/div>\n        <div class=\"b64img-file-info\">\n          <div class=\"b64img-file-info-row\">\n            <span class=\"b64img-file-info-label\">\u5143\u306e\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba:<\/span>\n            <span id=\"b64img-original-size\" class=\"b64img-file-info-value\"><\/span>\n          <\/div>\n          <div class=\"b64img-file-info-row\">\n            <span class=\"b64img-file-info-label\">\u5909\u63db\u5f8c\u306e\u30b5\u30a4\u30ba:<\/span>\n            <span id=\"b64img-converted-size\" class=\"b64img-file-info-value\"><\/span>\n          <\/div>\n          <div id=\"b64img-dimensions-row\" class=\"b64img-file-info-row\" style=\"display: none;\">\n            <span class=\"b64img-file-info-label\">\u753b\u50cf\u89e3\u50cf\u5ea6:<\/span>\n            <span id=\"b64img-dimensions\" class=\"b64img-file-info-value\"><\/span>\n          <\/div>\n        <\/div>\n        \n        <!-- \u30ea\u30b5\u30a4\u30ba\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb -->\n        <div id=\"b64img-resize-controls\" class=\"b64img-resize-controls\">\n          <button id=\"b64img-resize-toggle-btn\" class=\"b64img-resize-toggle-btn\" aria-expanded=\"false\" aria-controls=\"b64img-resize-panel\">\n            <span id=\"b64img-resize-icon\" class=\"b64img-resize-icon\" aria-hidden=\"true\">\u25b6<\/span>\n            \u753b\u50cf\u30ea\u30b5\u30a4\u30ba\u306f\u3053\u3061\u3089\n          <\/button>\n          <div id=\"b64img-resize-panel\" class=\"b64img-resize-panel\">\n            <div id=\"b64img-resize-options\" class=\"b64img-resize-options\">\n              <div class=\"b64img-option-row\">\n                <label class=\"b64img-option-label\" for=\"b64img-max-width\">\u6700\u5927\u5e45 (px)<\/label>\n                <input type=\"number\" id=\"b64img-max-width\" class=\"b64img-option-input\" placeholder=\"\u4f8b: 800\" min=\"1\" max=\"5000\" aria-describedby=\"b64img-width-hint\">\n                <span id=\"b64img-width-hint\" style=\"font-size: 12px; color: #666; display: block; margin-top: 4px;\">\u203b\u30a2\u30b9\u30da\u30af\u30c8\u6bd4\u3092\u7dad\u6301\u3057\u3066\u30ea\u30b5\u30a4\u30ba\u3055\u308c\u307e\u3059<\/span>\n              <\/div>\n              <div class=\"b64img-option-row\">\n                <label class=\"b64img-option-label\" for=\"b64img-quality\">\n                  \u753b\u8cea (JPEG\/WEBP\u7528)\n                  <span id=\"b64img-quality-display\" class=\"b64img-quality-display\">70%<\/span>\n                <\/label>\n                <input type=\"range\" id=\"b64img-quality\" class=\"b64img-option-input\" min=\"10\" max=\"100\" value=\"70\" step=\"5\" aria-valuemin=\"10\" aria-valuemax=\"100\" aria-valuenow=\"70\">\n              <\/div>\n              <button id=\"b64img-apply-resize-btn\" class=\"b64img-apply-resize-btn\">\u30ea\u30b5\u30a4\u30ba\u5b9f\u884c<\/button>\n            <\/div>\n            <div id=\"b64img-resizing-message\" class=\"b64img-resizing-message\">\n              <div class=\"b64img-resizing-text\">\n                \u30ea\u30b5\u30a4\u30ba\u4e2d\u3001\u3057\u3070\u3089\u304f\u304a\u5f85\u3061\u304f\u3060\u3055\u3044<span class=\"b64img-resizing-dots\"><\/span>\n              <\/div>\n              <div class=\"b64img-spinner\"><\/div>\n            <\/div>\n          <\/div>\n          <button id=\"b64img-reset-btn\" class=\"b64img-reset-btn\">\u5143\u306b\u623b\u3059<\/button>\n        <\/div>\n      <\/div>\n    <\/div>\n\n    <!-- \u30b3\u30fc\u30c9\u51fa\u529b -->\n    <div class=\"b64img-section\">\n      <p class=\"b64img-section-title\">\u5229\u7528\u30b7\u30fc\u30f3\u5225\u30b3\u30fc\u30c9<\/p>\n      \n      <div class=\"b64img-code-section\">\n        <p class=\"b64img-code-title\">HTML &lt;img&gt; \u30bf\u30b0<\/p>\n        <div class=\"b64img-code-wrapper\">\n          <textarea id=\"b64img-code-html\" class=\"b64img-code-area\" readonly aria-label=\"HTML\u30b3\u30fc\u30c9\"><\/textarea>\n          <button class=\"b64img-copy-btn\" data-target=\"b64img-code-html\" aria-label=\"HTML\u30b3\u30fc\u30c9\u3092\u30b3\u30d4\u30fc\">\u30b3\u30d4\u30fc<\/button>\n        <\/div>\n      <\/div>\n\n      <div class=\"b64img-code-section\">\n        <p class=\"b64img-code-title\">CSS background-image<\/p>\n        <div class=\"b64img-code-wrapper\">\n          <textarea id=\"b64img-code-css\" class=\"b64img-code-area\" readonly aria-label=\"CSS\u30b3\u30fc\u30c9\"><\/textarea>\n          <button class=\"b64img-copy-btn\" data-target=\"b64img-code-css\" aria-label=\"CSS\u30b3\u30fc\u30c9\u3092\u30b3\u30d4\u30fc\">\u30b3\u30d4\u30fc<\/button>\n        <\/div>\n      <\/div>\n\n      <div class=\"b64img-code-section\">\n        <p class=\"b64img-code-title\">Data URI (src\u306e\u307f)<\/p>\n        <div class=\"b64img-code-wrapper\">\n          <textarea id=\"b64img-code-datauri\" class=\"b64img-code-area\" readonly aria-label=\"Data URI\u30b3\u30fc\u30c9\"><\/textarea>\n          <button class=\"b64img-copy-btn\" data-target=\"b64img-code-datauri\" aria-label=\"Data URI\u3092\u30b3\u30d4\u30fc\">\u30b3\u30d4\u30fc<\/button>\n        <\/div>\n      <\/div>\n\n      <div class=\"b64img-code-section\">\n        <p class=\"b64img-code-title\">Raw Base64 (\u30d8\u30c3\u30c0\u30fc\u306a\u3057)<\/p>\n        <div class=\"b64img-code-wrapper\">\n          <textarea id=\"b64img-code-raw\" class=\"b64img-code-area\" readonly aria-label=\"Raw Base64\u30b3\u30fc\u30c9\"><\/textarea>\n          <button class=\"b64img-copy-btn\" data-target=\"b64img-code-raw\" aria-label=\"Raw Base64\u3092\u30b3\u30d4\u30fc\">\u30b3\u30d4\u30fc<\/button>\n        <\/div>\n      <\/div>\n    <\/div>\n\n    <!-- \u30af\u30ea\u30a2\u30dc\u30bf\u30f3 -->\n    <button id=\"b64img-clear-btn\" class=\"b64img-clear-btn\">\u30af\u30ea\u30a2 \/ \u518d\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9<\/button>\n  <\/div>\n  <\/div>\n\n  <!-- \u30c7\u30b3\u30fc\u30c9\u30bf\u30d6\u30b3\u30f3\u30c6\u30f3\u30c4 -->\n  <div id=\"b64img-decode-content\" class=\"b64img-tab-content\" role=\"tabpanel\" aria-labelledby=\"b64img-tab-decode\">\n    <!-- Base64\u5165\u529b\u30a8\u30ea\u30a2 -->\n    <div class=\"b64img-section\">\n      <p class=\"b64img-section-title\">Base64\u6587\u5b57\u5217\u3092\u5165\u529b<\/p>\n      <div class=\"b64img-decode-input-area\">\n        <textarea id=\"b64img-decode-input\" class=\"b64img-decode-textarea\" placeholder=\"data:image\/png;base64,iVBORw0KGgoAAAANS... \u307e\u305f\u306f Base64\u6587\u5b57\u5217\u306e\u307f\uff08\u30d8\u30c3\u30c0\u30fc\u306a\u3057\uff09\u3092\u8cbc\u308a\u4ed8\u3051\u3066\u304f\u3060\u3055\u3044\" aria-label=\"Base64\u6587\u5b57\u5217\u5165\u529b\"><\/textarea>\n        <button id=\"b64img-decode-btn\" class=\"b64img-decode-btn\">\u30c7\u30b3\u30fc\u30c9\u5b9f\u884c<\/button>\n      <\/div>\n    <\/div>\n\n    <!-- \u30c7\u30b3\u30fc\u30c9\u7d50\u679c\u30a8\u30ea\u30a2 -->\n    <div id=\"b64img-decode-result\" class=\"b64img-decode-result\">\n      <div class=\"b64img-section\">\n        <p class=\"b64img-section-title\">\u30c7\u30b3\u30fc\u30c9\u7d50\u679c<\/p>\n        <div class=\"b64img-preview-area\">\n          <div class=\"b64img-preview-wrapper\">\n            <img id=\"b64img-decode-preview\" class=\"b64img-preview-img\" alt=\"\u30c7\u30b3\u30fc\u30c9\u3055\u308c\u305f\u753b\u50cf\u30d7\u30ec\u30d3\u30e5\u30fc\">\n          <\/div>\n          <div class=\"b64img-file-info\">\n            <div class=\"b64img-file-info-row\">\n              <span class=\"b64img-file-info-label\">\u753b\u50cf\u5f62\u5f0f:<\/span>\n              <span id=\"b64img-decode-format\" class=\"b64img-file-info-value\"><\/span>\n            <\/div>\n            <div class=\"b64img-file-info-row\">\n              <span class=\"b64img-file-info-label\">\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba:<\/span>\n              <span id=\"b64img-decode-size\" class=\"b64img-file-info-value\"><\/span>\n            <\/div>\n            <div class=\"b64img-file-info-row\">\n              <span class=\"b64img-file-info-label\">\u753b\u50cf\u89e3\u50cf\u5ea6:<\/span>\n              <span id=\"b64img-decode-dimensions\" class=\"b64img-file-info-value\"><\/span>\n            <\/div>\n          <\/div>\n          <button id=\"b64img-download-btn\" class=\"b64img-download-btn\">\u753b\u50cf\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/button>\n        <\/div>\n      <\/div>\n      \n      <!-- \u30af\u30ea\u30a2\u30dc\u30bf\u30f3 -->\n      <button id=\"b64img-decode-clear-btn\" class=\"b64img-clear-btn\">\u30af\u30ea\u30a2<\/button>\n    <\/div>\n  <\/div>\n<\/div>\n\n<script>\n\n<\/script>\n\n\n\n<p>\u3053\u306e\u30c4\u30fc\u30eb\u306f\u3001\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u3068\u300cBase64\uff08\u30c6\u30ad\u30b9\u30c8\u30c7\u30fc\u30bf\uff09\u300d\u3092\u76f8\u4e92\u306b\u5909\u63db\u3067\u304d\u308b\u7121\u6599\u306eWEB\u30c4\u30fc\u30eb\u3067\u3059\u3002\u30d6\u30e9\u30a6\u30b6\u4e0a\u3067\u5b8c\u7d50\u3059\u308b\u305f\u3081\u3001\u7279\u5225\u306a\u30bd\u30d5\u30c8\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306f\u4e0d\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-0\">\u3053\u306e\u30c4\u30fc\u30eb\u3067\u3067\u304d\u308b\u3053\u3068<\/h2>\n\n\n\n<p><strong>\u4e3b\u306a\u6a5f\u80fd<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u753b\u50cf\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\uff08\u5909\u63db\uff09<\/strong> JPG\u3001PNG\u3001GIF\u3001WEBP\u5f62\u5f0f\u306e\u753b\u50cf\u3092\u3001HTML\u3084CSS\u3067\u3059\u3050\u306b\u4f7f\u3048\u308bBase64\u6587\u5b57\u5217\u306b\u5909\u63db\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u753b\u50cf\u306e\u30c7\u30b3\u30fc\u30c9\uff08\u5fa9\u5143\uff09<\/strong> Base64\u6587\u5b57\u5217\u3092\u5165\u529b\u3057\u3066\u3001\u5143\u306e\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u3068\u3057\u3066\u30d7\u30ec\u30d3\u30e5\u30fc\u30fb\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30b5\u30a4\u30ba\u3068\u753b\u8cea\u306e\u8abf\u6574<\/strong> Base64\u5316\u3059\u308b\u3068\u30c7\u30fc\u30bf\u30b5\u30a4\u30ba\u304c\u5927\u304d\u304f\u306a\u308b\u3068\u3044\u3046\u30c7\u30e1\u30ea\u30c3\u30c8\u3092\u89e3\u6d88\u3059\u308b\u305f\u3081\u3001\u5909\u63db\u524d\u306b\u753b\u50cf\u306e\u30ea\u30b5\u30a4\u30ba\u3084\u753b\u8cea\uff08\u5727\u7e2e\u7387\uff09\u306e\u8abf\u6574\u304c\u53ef\u80fd\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30b3\u30fc\u30c9\u306e\u30ef\u30f3\u30af\u30ea\u30c3\u30af\u30b3\u30d4\u30fc<\/strong> <code>img<\/code>\u30bf\u30b0\u7528\u3001CSS\u80cc\u666f\u753b\u50cf\u7528\u306a\u3069\u3001\u7528\u9014\u306b\u5408\u308f\u305b\u305f\u5f62\u5f0f\u3067\u30b3\u30fc\u30c9\u3092\u30b3\u30d4\u30fc\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-1\">\u3053\u306e\u30c4\u30fc\u30eb\u3067\u53d6\u5f97\u3059\u308b\u60c5\u5831\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<p><strong>Base64\uff08\u30d9\u30fc\u30b964\uff09\u3068\u306f<\/strong> \u30c7\u30fc\u30bf\u309264\u7a2e\u985e\u306e\u82f1\u6570\u5b57\u3068\u8a18\u53f7\uff08A-Z, a-z, 0-9, +, \/\uff09\u306e\u307f\u3092\u4f7f\u3063\u3066\u8868\u73fe\u3059\u308b\u30a8\u30f3\u30b3\u30fc\u30c9\u65b9\u5f0f\u3067\u3059\u3002\u753b\u50cf\u306a\u3069\u306e\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u30c6\u30ad\u30b9\u30c8\u30c7\u30fc\u30bf\u3068\u3057\u3066\u6271\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u305f\u3081\u3001\u901a\u4fe1\u74b0\u5883\u3084\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u306e\u30c7\u30fc\u30bf\u53d7\u3051\u6e21\u3057\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>Data URI\u30b9\u30ad\u30fc\u30e0\u3068\u306f<\/strong> \u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u4e0a\u3067\u3001\u753b\u50cf\u306a\u3069\u306e\u5916\u90e8\u30c7\u30fc\u30bf\u3092HTML\u6587\u66f8\u5185\u306b\u76f4\u63a5\u57cb\u3081\u8fbc\u3080\u305f\u3081\u306e\u8a18\u8ff0\u65b9\u6cd5\u3067\u3059\u3002\u3053\u306e\u30c4\u30fc\u30eb\u3067\u751f\u6210\u3055\u308c\u308b\u300cdata:image\/\u2026\u300d\u304b\u3089\u59cb\u307e\u308b\u30b3\u30fc\u30c9\u304c\u3053\u308c\u306b\u8a72\u5f53\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u306b\u3064\u3044\u3066<\/strong> \u4e00\u822c\u7684\u306b\u3001\u753b\u50cf\u3092Base64\u306b\u5909\u63db\u3059\u308b\u3068\u3001\u5143\u306e\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3088\u308a\u7d041.3\u500d\uff08\u7d0433%\u5897\uff09\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u5de8\u5927\u306a\u5199\u771f\u3092\u305d\u306e\u307e\u307e\u5909\u63db\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u30a2\u30a4\u30b3\u30f3\u3084\u30ed\u30b4\u3001\u5c0f\u3055\u3081\u306e\u753b\u50cf\u306b\u4f7f\u7528\u3059\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u3053\u306e\u30c4\u30fc\u30eb\u306b\u306f\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3092\u6291\u3048\u308b\u305f\u3081\u306e\u30ea\u30b5\u30a4\u30ba\u6a5f\u80fd\u304c\u3064\u3044\u3066\u3044\u308b\u305f\u3081\u3001\u7528\u9014\u306b\u5408\u308f\u305b\u3066\u8abf\u6574\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-2\">\u3053\u306e\u30c4\u30fc\u30eb\u304c\u5f79\u7acb\u3064\u3068\u304d\u306f\u3069\u3093\u306a\u3068\u304d\uff1f<\/h2>\n\n\n\n<p>\u4e3b\u306bWeb\u5236\u4f5c\u3084\u30b7\u30b9\u30c6\u30e0\u958b\u767a\u3001\u30c7\u30fc\u30bf\u7ba1\u7406\u306e\u73fe\u5834\u3067\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>1. Web\u30b5\u30a4\u30c8\u306e\u8868\u793a\u901f\u5ea6\u3092\u4e0a\u3052\u305f\u3044\u3068\u304d\uff08HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u524a\u6e1b\uff09<\/strong> <br>\u901a\u5e38\u3001Web\u30da\u30fc\u30b8\u4e0a\u306e\u753b\u50cf\u306f1\u679a\u3054\u3068\u306b\u30b5\u30fc\u30d0\u30fc\u3078\u8aad\u307f\u8fbc\u307f\uff08HTTP\u30ea\u30af\u30a8\u30b9\u30c8\uff09\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u5c0f\u3055\u306a\u30a2\u30a4\u30b3\u30f3\u3084\u80cc\u666f\u753b\u50cf\u3092Base64\u5316\u3057\u3066HTML\/CSS\u306b\u76f4\u63a5\u57cb\u3081\u8fbc\u3081\u3070\u3001\u901a\u4fe1\u56de\u6570\u3092\u6e1b\u3089\u3057\u3001\u30da\u30fc\u30b8\u306e\u8868\u793a\u901f\u5ea6\u3092\u6539\u5584\u3067\u304d\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>2. \u753b\u50cf\u3092\u30b5\u30fc\u30d0\u30fc\u306b\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3067\u304d\u306a\u3044\u3068\u304d<\/strong> <br>HTML\u30e1\u30fc\u30eb\u306e\u4f5c\u6210\u3084\u3001\u30d6\u30ed\u30b0\u30b5\u30fc\u30d3\u30b9\u3001\u63b2\u793a\u677f\u306a\u3069\u3001\u753b\u50cf\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3084\u7ba1\u7406\u304c\u96e3\u3057\u3044\u74b0\u5883\u3067\u3082\u3001Base64\u30b3\u30fc\u30c9\u3067\u3042\u308c\u3070\u300c\u6587\u5b57\u300d\u3068\u3057\u3066\u753b\u50cf\u3092\u8cbc\u308a\u4ed8\u3051\u3066\u8868\u793a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>3. \u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u753b\u50cf\u3092\u6271\u3044\u305f\u3044\u3068\u304d<\/strong> <br>JSON\u30c7\u30fc\u30bf\u3068\u3057\u3066\u753b\u50cf\u3092API\u3067\u9001\u53d7\u4fe1\u3059\u308b\u5834\u5408\u3084\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u753b\u50cf\u81ea\u4f53\u3092\u30c6\u30ad\u30b9\u30c8\u3068\u3057\u3066\u4fdd\u5b58\u3057\u305f\u3044\u5834\u5408\u306b\u5229\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>4. 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