{"id":15239,"date":"2026-06-26T15:56:43","date_gmt":"2026-06-26T06:56:43","guid":{"rendered":"https:\/\/rakkokeyword.com\/techo\/?p=15239"},"modified":"2026-06-26T15:56:44","modified_gmt":"2026-06-26T06:56:44","slug":"tool-dummy-image","status":"publish","type":"post","link":"https:\/\/rakkokeyword.com\/techo\/tool-dummy-image\/","title":{"rendered":"\u30c0\u30df\u30fc\u753b\u50cf\u751f\u6210\u30c4\u30fc\u30eb"},"content":{"rendered":"\n<div id=\"dimggen_app\" style=\"width: 100%; margin: 0 0 40px 0; padding: 0; box-sizing: border-box; font-family: sans-serif; color: #333; line-height: 1.5;\">\n  \n  <!-- \u30d7\u30ec\u30d3\u30e5\u30fc\u9818\u57df -->\n  <p class=\"dimggen_heading\" style=\"font-weight: bold; font-size: 16px; margin: 0 0 8px 0;\">\u30d7\u30ec\u30d3\u30e5\u30fc<\/p>\n  <div style=\"width: 100%; max-width: 720px; max-height: 360px; background-color: #f8f8f8; background-image: linear-gradient(45deg, #ececec 25%, transparent 25%), linear-gradient(-45deg, #ececec 25%, transparent 25%), linear-gradient(45deg, transparent 75%, #ececec 75%), linear-gradient(-45deg, transparent 75%, #ececec 75%); background-size: 20px 20px; background-position: 0 0, 0 10px, 10px -10px, -10px 0; border: 1px solid #ddd; border-radius: 8px; padding: 12px; box-sizing: border-box; text-align: center; margin-bottom: 16px; overflow: hidden; display: flex; align-items: center; justify-content: center; min-height: 140px;\">\n    <img id=\"dimggen_preview_img\" alt=\"dummy image preview\" style=\"max-width: 100%; max-height: 360px; height: auto; object-fit: contain; display: block; border: 1px solid rgba(0,0,0,0.12);\">\n  <\/div>\n  \n  <!-- \u30d7\u30ec\u30d3\u30e5\u30fc\u753b\u50cf\u60c5\u5831 -->\n  <p id=\"dimggen_info\" style=\"font-size: 13px; color: #666; text-align: center; margin: 4px 0 10px 0; max-width: 720px;\"><\/p>\n\n  <!-- \u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u30dc\u30bf\u30f3 -->\n  <div style=\"margin-bottom: 24px; max-width: 720px;\">\n    <button id=\"dimggen_dl_btn\" style=\"background: #13284B; color: #fff; border: none; height: 44px; padding: 0 24px; font-size: 16px; cursor: pointer; width: 100%; border-radius: 4px; font-weight: bold; transition: opacity 0.2s;\">\u30c0\u30df\u30fc\u753b\u50cf\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/button>\n  <\/div>\n\n  <!-- \u5165\u529b\u30d5\u30a9\u30fc\u30e0\u9818\u57df -->\n  <div style=\"max-width: 720px; margin-bottom: 24px;\">\n    \n    <p class=\"dimggen_heading\" style=\"font-weight: bold; margin: 0 0 8px 0;\">\u7528\u9014\u5225\u30d7\u30ea\u30bb\u30c3\u30c8<\/p>\n    <select id=\"dimggen_preset\" style=\"width: 100%; height: 40px; border: 1px solid #ccc; padding: 0 8px; margin-bottom: 16px; background: #fff; box-sizing: border-box;\">\n      <option value=\"800,600\">\u30ab\u30b9\u30bf\u30e0 (800 \u00d7 600)<\/option>\n      <option value=\"1200,630\">OGP\u753b\u50cf (1200 \u00d7 630)<\/option>\n      <option value=\"1200,675\">X\uff08\u65e7Twitter\uff09\u753b\u50cf (1200 \u00d7 675)<\/option>\n      <option value=\"1080,1080\">Instagram\u6295\u7a3f (1080 \u00d7 1080)<\/option>\n      <option value=\"1080,1920\">Instagram\u30b9\u30c8\u30fc\u30ea\u30fc\u30ba (1080 \u00d7 1920)<\/option>\n      <option value=\"1280,720\">YouTube\u30b5\u30e0\u30cd\u30a4\u30eb (1280 \u00d7 720)<\/option>\n      <option value=\"1920,1080\">\u30d5\u30ebHD (1920 \u00d7 1080)<\/option>\n    <\/select>\n\n    <div style=\"display: flex; gap: 16px; margin-bottom: 16px;\">\n      <div style=\"flex: 1;\">\n        <p class=\"dimggen_heading\" style=\"font-weight: bold; margin: 0 0 8px 0;\">\u5e45 (px)<\/p>\n        <input type=\"number\" id=\"dimggen_width\" value=\"800\" min=\"1\" max=\"4000\" style=\"width: 100%; height: 40px; box-sizing: border-box; padding: 0 8px; border: 1px solid #ccc;\">\n      <\/div>\n      <div style=\"flex: 1;\">\n        <p class=\"dimggen_heading\" style=\"font-weight: bold; margin: 0 0 8px 0;\">\u9ad8\u3055 (px)<\/p>\n        <input type=\"number\" id=\"dimggen_height\" value=\"600\" min=\"1\" max=\"4000\" style=\"width: 100%; height: 40px; box-sizing: border-box; padding: 0 8px; border: 1px solid #ccc;\">\n      <\/div>\n    <\/div>\n\n    <p class=\"dimggen_heading\" style=\"font-weight: bold; margin: 0 0 8px 0;\">\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/p>\n    <select id=\"dimggen_format\" style=\"width: 100%; height: 40px; border: 1px solid #ccc; padding: 0 8px; margin-bottom: 16px; background: #fff; box-sizing: border-box;\">\n      <option value=\"png\">PNG<\/option>\n      <option value=\"jpeg\">JPG<\/option>\n      <option value=\"webp\">WebP<\/option>\n      <option value=\"svg\">SVG<\/option>\n    <\/select>\n\n    <div style=\"display: flex; gap: 16px; margin-bottom: 16px; flex-wrap: wrap;\">\n      <div style=\"flex: 1; min-width: 150px;\">\n        <p class=\"dimggen_heading\" style=\"font-weight: bold; margin: 0 0 8px 0;\">\u80cc\u666f\u8272<\/p>\n        <div style=\"display: flex; gap: 8px;\">\n          <input type=\"color\" id=\"dimggen_bg_color\" value=\"#cccccc\" style=\"height: 40px; width: 40px; padding: 0; border: none; cursor: pointer; background: transparent;\">\n          <input type=\"text\" id=\"dimggen_bg_hex\" value=\"#cccccc\" maxlength=\"7\" style=\"flex: 1; height: 40px; box-sizing: border-box; padding: 0 8px; border: 1px solid #ccc;\">\n        <\/div>\n      <\/div>\n      <div style=\"flex: 1; min-width: 150px;\">\n        <p class=\"dimggen_heading\" style=\"font-weight: bold; margin: 0 0 8px 0;\">\u6587\u5b57\u8272<\/p>\n        <div style=\"display: flex; gap: 8px;\">\n          <input type=\"color\" id=\"dimggen_text_color\" value=\"#333333\" style=\"height: 40px; width: 40px; padding: 0; border: none; cursor: pointer; background: transparent;\">\n          <input type=\"text\" id=\"dimggen_text_hex\" value=\"#333333\" maxlength=\"7\" style=\"flex: 1; height: 40px; box-sizing: border-box; padding: 0 8px; border: 1px solid #ccc;\">\n        <\/div>\n      <\/div>\n    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8px 8px; border: 1px solid #ccc; background: #fafafa; resize: none; font-family: monospace; font-size: 12px; color: #555;\"><\/textarea>\n      <button class=\"dimggen_copy_btn\" data-target=\"dimggen_html_out\" style=\"position: absolute; right: 8px; top: 8px; background: #13284B; color: #fff; border: none; height: 32px; padding: 0 12px; cursor: pointer; font-size: 12px; border-radius: 2px;\">\u30b3\u30d4\u30fc<\/button>\n    <\/div>\n\n    <p class=\"dimggen_heading\" style=\"font-weight: bold; margin: 0 0 8px 0;\">Base64\u30b3\u30fc\u30c9<\/p>\n    <div style=\"position: relative; margin-bottom: 16px;\">\n      <textarea id=\"dimggen_base64_out\" readonly style=\"width: 100%; height: 60px; box-sizing: border-box; padding: 8px 80px 8px 8px; border: 1px solid #ccc; background: #fafafa; resize: none; font-family: monospace; font-size: 12px; color: #555;\"><\/textarea>\n      <button class=\"dimggen_copy_btn\" data-target=\"dimggen_base64_out\" style=\"position: absolute; right: 8px; top: 8px; background: #13284B; color: #fff; border: none; height: 32px; padding: 0 12px; cursor: pointer; font-size: 12px; border-radius: 2px;\">\u30b3\u30d4\u30fc<\/button>\n    <\/div>\n  <\/div>\n  \n  <!-- \u901a\u77e5\u30c8\u30fc\u30b9\u30c8 -->\n  <div id=\"dimggen_toast\" style=\"display: none; position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: rgba(0,0,0,0.8); color: #fff; padding: 10px 20px; border-radius: 4px; font-size: 14px; z-index: 9999;\">\u30b3\u30d4\u30fc\u3057\u307e\u3057\u305f<\/div>\n\n<\/div>\n\n<script>\n\n<\/script>\n\n\n\n<p 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class=\"wp-block-list\">\n<li><strong>\u30d7\u30ea\u30bb\u30c3\u30c8\u306b\u3088\u308b\u7c21\u5358\u30b5\u30a4\u30ba\u6307\u5b9a<\/strong>\uff1aOGP\u753b\u50cf\u3001X\uff08\u65e7Twitter\uff09\u3001Instagram\u3001YouTube\u30b5\u30e0\u30cd\u30a4\u30eb\u306a\u3069\u306e\u983b\u51fa\u30b5\u30a4\u30ba\u3092\u30ef\u30f3\u30af\u30ea\u30c3\u30af\u3067\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u81ea\u7531\u306a\u30ab\u30b9\u30bf\u30de\u30a4\u30ba<\/strong>\uff1a1px\u304b\u30894000px\u307e\u3067\u306e\u4efb\u610f\u306e\u30b5\u30a4\u30ba\u3001\u80cc\u666f\u8272\u3001\u6587\u5b57\u8272\u3001\u4efb\u610f\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u6307\u5b9a\u53ef\u80fd\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u591a\u5f69\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u51fa\u529b<\/strong>\uff1aPNG\u3001JPG\u3001WebP\u3001SVG\u306e4\u7a2e\u985e\u306e\u30d5\u30a1\u30a4\u30eb\u5f62\u5f0f\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>Base64\u30b3\u30fc\u30c9\u306e\u5373\u6642\u751f\u6210<\/strong>\uff1a\u753b\u50cf\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u305b\u305a\u306b\u3001HTML\u306b\u76f4\u63a5\u57cb\u3081\u8fbc\u3081\u308bimg\u30bf\u30b0\u3084Base64\u30b3\u30fc\u30c9\u3092\u30ef\u30f3\u30af\u30ea\u30c3\u30af\u3067\u30b3\u30d4\u30fc\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<h3 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class=\"wp-block-list\">\n<li><strong>\u30b5\u30a4\u30ba\u306e\u6307\u5b9a<\/strong>\uff1a\u300c\u7528\u9014\u5225\u30d7\u30ea\u30bb\u30c3\u30c8\u300d\u304b\u3089\u9078\u629e\u3059\u308b\u304b\u3001\u300c\u5e45\u300d\u3068\u300c\u9ad8\u3055\u300d\u306e\u6570\u5024\u3092\u76f4\u63a5\u5165\u529b\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c7\u30b6\u30a4\u30f3\u306e\u8abf\u6574<\/strong>\uff1a\u4fdd\u5b58\u3057\u305f\u3044\u300c\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u300d\u3092\u9078\u3073\u3001\u30ab\u30e9\u30fc\u30d4\u30c3\u30ab\u30fc\u307e\u305f\u306fHEX\u30b3\u30fc\u30c9\uff08#\u304b\u3089\u59cb\u307e\u308b6\u6841\u306e\u82f1\u6570\u5b57\uff09\u3067\u300c\u80cc\u666f\u8272\u300d\u3068\u300c\u6587\u5b57\u8272\u300d\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c6\u30ad\u30b9\u30c8\u306e\u5165\u529b<\/strong>\uff1a\u753b\u50cf\u306e\u4e2d\u592e\u306b\u8868\u793a\u3055\u305b\u305f\u3044\u6587\u5b57\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u300c\u8868\u793a\u30c6\u30ad\u30b9\u30c8\u300d\u306b\u5165\u529b\u3057\u307e\u3059\uff08\u672a\u5165\u529b\u306e\u5834\u5408\u306f\u753b\u50cf\u30b5\u30a4\u30ba\u304c\u8868\u793a\u3055\u308c\u307e\u3059\uff09\u3002<\/li>\n\n\n\n<li><strong>\u4fdd\u5b58\u30fb\u30b3\u30d4\u30fc<\/strong>\uff1a\u30d7\u30ec\u30d3\u30e5\u30fc\u3092\u78ba\u8a8d\u3057\u3001\u300c\u30c0\u30df\u30fc\u753b\u50cf\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u300d\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u3066\u753b\u50cf\u3092\u4fdd\u5b58\u3059\u308b\u304b\u3001\u30da\u30fc\u30b8\u4e0b\u90e8\u306e\u300cHTML\u30bf\u30b0\u30b3\u30fc\u30c9\u300d\u300cBase64\u30b3\u30fc\u30c9\u300d\u3092\u30b3\u30d4\u30fc\u3057\u3066\u5229\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u3053\u306e\u30c4\u30fc\u30eb\u3067\u53d6\u5f97\u3059\u308b\u60c5\u5831\u306e\u57fa\u790e\u77e5\u8b58<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30c0\u30df\u30fc\u753b\u50cf\uff08\u30d7\u30ec\u30fc\u30b9\u30db\u30eb\u30c0\u30fc\uff09\u3068\u306f<\/strong> <br>\u672c\u756a\u7528\u306e\u753b\u50cf\u304c\u6e96\u5099\u3067\u304d\u308b\u307e\u3067\u306e\u9593\u3001\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u5d29\u308c\u3092\u9632\u3044\u3060\u308a\u3001\u30c7\u30b6\u30a4\u30f3\u306e\u5168\u4f53\u50cf\u3092\u78ba\u8a8d\u3057\u305f\u308a\u3059\u308b\u305f\u3081\u306b\u4e00\u6642\u7684\u306b\u914d\u7f6e\u3057\u3066\u304a\u304f\u4eee\u306e\u753b\u50cf\u306e\u3053\u3068\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>Base64\u30b3\u30fc\u30c9\u3068\u306f<\/strong> <br>\u753b\u50cf\u306a\u3069\u306e\u30c7\u30fc\u30bf\u3092\u3001\u4e00\u5b9a\u306e\u30eb\u30fc\u30eb\u306b\u57fa\u3065\u3044\u3066\u6587\u5b57\u5217\uff08\u30c6\u30ad\u30b9\u30c8\uff09\u306b\u5909\u63db\u3057\u305f\u3082\u306e\u3067\u3059\u3002\u3053\u306e\u6587\u5b57\u5217\u3092HTML\u30d5\u30a1\u30a4\u30eb\u306a\u3069\u306b\u76f4\u63a5\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u3001\u30b5\u30fc\u30d0\u30fc\u3078\u306e\u901a\u4fe1\u56de\u6570\u3092\u6e1b\u3089\u3057\u3001\u30da\u30fc\u30b8\u306e\u8868\u793a\u901f\u5ea6\u3092\u6539\u5584\u3059\u308b\u52b9\u679c\u304c\u671f\u5f85\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">\u3053\u306e\u30c4\u30fc\u30eb\u304c\u5f79\u7acb\u3064\u3068\u304d\u306f\u3069\u3093\u306a\u3068\u304d\uff1f \u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306f\uff1f<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Web\u30c7\u30b6\u30a4\u30f3\u30fb\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u6642<\/strong>\uff1a\u30ef\u30a4\u30e4\u30fc\u30d5\u30ec\u30fc\u30e0\u3084\u30e2\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u4f5c\u6210\u3059\u308b\u969b\u3001\u4eee\u306e\u753b\u50cf\u3092\u914d\u7f6e\u3057\u3066\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u78ba\u8a8d\u3057\u305f\u3044\u3068\u304d\u3002<\/li>\n\n\n\n<li><strong>SNS\u904b\u7528\u306e\u6e96\u5099<\/strong>\uff1aX\u3084Instagram\u3001\u30d6\u30ed\u30b0\u306eOGP\u753b\u50cf\u306a\u3069\u3001\u63a8\u5968\u30b5\u30a4\u30ba\u306b\u5408\u308f\u305b\u305f\u753b\u50cf\u304c\u3069\u306e\u3088\u3046\u306a\u898b\u3048\u65b9\u306b\u306a\u308b\u304b\u30c6\u30b9\u30c8\u3057\u305f\u3044\u3068\u304d\u3002<\/li>\n\n\n\n<li><strong>\u30b7\u30b9\u30c6\u30e0\u958b\u767a\u306e\u30c6\u30b9\u30c8<\/strong>\uff1a\u30d7\u30ed\u30b0\u30e9\u30e0\u958b\u767a\u4e2d\u306b\u3001\u30c0\u30df\u30fc\u306e\u30e6\u30fc\u30b6\u30fc\u30a2\u30a4\u30b3\u30f3\u3084\u30b5\u30e0\u30cd\u30a4\u30eb\u753b\u50cf\u3068\u3057\u3066\u5927\u91cf\u306e\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u304c\u5fc5\u8981\u306a\u3068\u304d\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u9069\u5207\u306a\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u9078\u3073\u65b9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u51fa\u529b\u3059\u308b\u5f62\u5f0f\u306b\u8ff7\u3063\u305f\u5834\u5408\u306f\u3001\u7528\u9014\u306b\u5408\u308f\u305b\u3066\u4ee5\u4e0b\u3092\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SVG<\/strong>\uff1a\u62e1\u5927\u30fb\u7e2e\u5c0f\u3057\u3066\u3082\u753b\u8cea\u304c\u52a3\u5316\u3057\u306a\u3044\u30d9\u30af\u30bf\u30fc\u753b\u50cf\u3067\u3059\u3002\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30c7\u30b6\u30a4\u30f3\u306e\u30c6\u30b9\u30c8\u306b\u6700\u9069\u3067\u3059\u3002<\/p>\n\n\n\n<p 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