{"id":12898,"date":"2026-02-18T11:15:37","date_gmt":"2026-02-18T02:15:37","guid":{"rendered":"https:\/\/rakkoserver.com\/plus\/?p=12898"},"modified":"2026-02-18T11:15:37","modified_gmt":"2026-02-18T02:15:37","slug":"tool-favicon-generator","status":"publish","type":"post","link":"https:\/\/rakkoserver.com\/plus\/tool-favicon-generator\/","title":{"rendered":"\u30d5\u30a1\u30d3\u30b3\u30f3\u4f5c\u6210\u30c4\u30fc\u30eb"},"content":{"rendered":"\n<script src=\"https:\/\/media-api.qcdgv19414.rakkoserver.net\/lib\/jszip.min.js\"><\/script>\n\n<style>\n\/* \u30c4\u30fc\u30eb\u56fa\u6709\u306e\u30b9\u30bf\u30a4\u30eb\u5b9a\u7fa9 - \u65e2\u5b58\u30b5\u30a4\u30c8\u3078\u306e\u5f71\u97ff\u3092\u907f\u3051\u308b\u305f\u3081\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u3092\u4f7f\u7528 *\/\n#rakko_favicon_tool {\n    width: 100%;\n    max-width: 100%;\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, \"Helvetica Neue\", Arial, sans-serif;\n    color: #333;\n    box-sizing: border-box;\n    margin: 0;\n    padding: 0;\n    line-height: 1.5;\n}\n\n#rakko_favicon_tool * {\n    box-sizing: border-box;\n}\n\n\/* 1. \u5b89\u5fc3\u8a34\u6c42\u30d6\u30ed\u30c3\u30af *\/\n.rakko_fav_security {\n    background-color: #f0fdf4;\n    border: 1px solid #bbf7d0;\n    color: #166534;\n    padding: 12px;\n    border-radius: 4px;\n    font-size: 14px;\n    display: flex;\n    align-items: center;\n    gap: 8px;\n    margin-bottom: 20px;\n}\n\n.rakko_fav_security svg {\n    width: 20px;\n    height: 20px;\n    fill: currentColor;\n    flex-shrink: 0;\n}\n\n\/* 2. \u5165\u529b\u30fb\u8a2d\u5b9a\u30d6\u30ed\u30c3\u30af *\/\n.rakko_fav_upload_area {\n    border: 2px dashed #ccc;\n    border-radius: 8px;\n    padding: 40px 20px;\n    text-align: center;\n    cursor: pointer;\n    background-color: #fafafa;\n    transition: all 0.3s ease;\n    margin-bottom: 20px;\n    position: relative;\n    overflow: hidden;\n}\n\n.rakko_fav_upload_area:hover, .rakko_fav_upload_area.dragover {\n    border-color: #13284B;\n    background-color: #f0f4f8;\n}\n\n.rakko_fav_upload_icon {\n    font-size: 40px;\n    color: #999;\n    margin-bottom: 10px;\n    display: block;\n}\n\n.rakko_fav_upload_text {\n    font-weight: bold;\n    font-size: 16px;\n    color: #444;\n    margin: 0 0 5px 0;\n}\n\n.rakko_fav_upload_sub {\n    font-size: 12px;\n    color: #888;\n    margin: 0;\n}\n\n#rakko_fav_file_input {\n    position: absolute;\n    width: 100%;\n    height: 100%;\n    top: 0;\n    left: 0;\n    opacity: 0;\n    cursor: pointer;\n}\n\n\/* \u30d5\u30a1\u30a4\u30eb\u9078\u629e\u5f8c\u306e\u8868\u793a *\/\n.rakko_fav_preview_thumb {\n    max-width: 120px;\n    max-height: 120px;\n    margin: 0 auto 10px auto;\n    display: none; \/* JS\u3067\u5236\u5fa1 *\/\n    box-shadow: 0 2px 5px rgba(0,0,0,0.1);\n    object-fit: contain;\n}\n\n.rakko_fav_settings {\n    margin-bottom: 25px;\n}\n\n.rakko_fav_setting_group {\n    margin-bottom: 15px;\n}\n\n.rakko_fav_label {\n    font-weight: bold;\n    font-size: 14px;\n    margin-bottom: 8px;\n    display: block;\n}\n\n.rakko_fav_options {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 15px;\n}\n\n.rakko_fav_checkbox, .rakko_fav_radio {\n    display: flex;\n    align-items: center;\n    gap: 5px;\n    font-size: 14px;\n    cursor: pointer;\n}\n\n\/* \u30a2\u30af\u30b7\u30e7\u30f3\u30dc\u30bf\u30f3 *\/\n.rakko_fav_btn {\n    display: block;\n    width: 100%;\n    height: 50px;\n    background-color: #13284B;\n    color: #fff;\n    border: none;\n    border-radius: 4px;\n    font-size: 16px;\n    font-weight: bold;\n    cursor: pointer;\n    transition: background-color 0.3s;\n}\n\n.rakko_fav_btn:hover {\n    opacity: 0.9;\n}\n\n.rakko_fav_btn:disabled {\n    background-color: #ccc;\n    cursor: not-allowed;\n}\n\n\/* 3. \u7d50\u679c\u30fb\u30a2\u30af\u30b7\u30e7\u30f3\u30d6\u30ed\u30c3\u30af *\/\n#rakko_fav_result_block {\n    display: none; \/* \u521d\u671f\u975e\u8868\u793a *\/\n    margin-top: 30px;\n    border-top: 1px solid #eee;\n    padding-top: 30px;\n    animation: fadeIn 0.5s ease;\n}\n\n@keyframes fadeIn {\n    from { opacity: 0; transform: translateY(10px); }\n    to { opacity: 1; transform: translateY(0); }\n}\n\n.rakko_fav_preview_container {\n    display: flex;\n    border: 1px solid #ddd;\n    border-radius: 8px;\n    overflow: hidden;\n    margin-bottom: 10px;\n}\n\n.rakko_fav_preview_box {\n    flex: 1;\n    padding: 20px;\n    display: flex;\n    flex-direction: column;\n    align-items: center;\n    justify-content: center;\n    min-height: 120px;\n}\n\n.rakko_fav_preview_light {\n    background-color: #ffffff;\n    border-right: 1px solid #ddd;\n}\n\n.rakko_fav_preview_dark {\n    background-color: #202124; \/* Chrome Dark Mode Color *\/\n}\n\n.rakko_fav_preview_label {\n    font-size: 12px;\n    margin-top: 10px;\n}\n\n.rakko_fav_preview_light .rakko_fav_preview_label { color: #666; }\n.rakko_fav_preview_dark .rakko_fav_preview_label { color: #aaa; }\n\n.rakko_fav_warning {\n    color: #d97706;\n    background-color: #fffbeb;\n    padding: 10px;\n    border-radius: 4px;\n    font-size: 13px;\n    margin-bottom: 20px;\n    display: none; \/* JS\u3067\u5236\u5fa1 *\/\n    align-items: center;\n    gap: 5px;\n}\n\n.rakko_fav_download_area {\n    display: grid;\n    grid-template-columns: 1fr 1fr;\n    gap: 15px;\n    margin-bottom: 15px;\n}\n\n.rakko_fav_btn_dl {\n    background-color: #fff;\n    color: #333;\n    border: 1px solid #ccc;\n    height: 45px;\n    font-size: 14px;\n    display: flex;\n    align-items: center;\n    justify-content: center;\n    gap: 5px;\n    cursor: pointer;\n}\n\n.rakko_fav_btn_dl:hover {\n    background-color: #f5f5f5;\n    border-color: #999;\n}\n\n.rakko_fav_btn_dl.primary {\n    background-color: #13284B;\n    color: #fff;\n    border-color: #13284B;\n}\n\n.rakko_fav_btn_dl.primary:hover {\n    background-color: #0f203c;\n}\n\n.rakko_fav_reset_link {\n    text-align: center;\n    margin-top: 15px;\n}\n\n.rakko_fav_reset_btn {\n    background: none;\n    border: none;\n    color: #666;\n    text-decoration: underline;\n    cursor: pointer;\n    font-size: 14px;\n}\n\n\/* \u30ed\u30fc\u30c7\u30a3\u30f3\u30b0 *\/\n.rakko_fav_loading {\n    display: none;\n    text-align: center;\n    margin-top: 10px;\n    font-size: 14px;\n    color: #666;\n}\n\n\/* \u30b9\u30de\u30db\u5bfe\u5fdc *\/\n@media (max-width: 480px) {\n    .rakko_fav_download_area {\n        grid-template-columns: 1fr;\n    }\n}\n<\/style>\n\n<div id=\"rakko_favicon_tool\">\n    <div class=\"rakko_fav_security\">\n        <svg viewBox=\"0 0 24 24\"><path d=\"M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1 15l-5-5 1.41-1.41L11 14.17l7.59-7.59L20 8l-9 9z\" \/><\/svg>\n        <span>\u5b89\u5fc3\u8a2d\u8a08: \u753b\u50cf\u306f\u304a\u5ba2\u69d8\u306e\u7aef\u672b\u5185\u3067\u5909\u63db\u3055\u308c\u3001\u30b5\u30fc\u30d0\u30fc\u306b\u306f\u9001\u4fe1\u3055\u308c\u307e\u305b\u3093<\/span>\n    <\/div>\n\n    <div id=\"rakko_fav_input_block\">\n        <div class=\"rakko_fav_upload_area\" id=\"rakko_fav_dropzone\">\n            <input type=\"file\" id=\"rakko_fav_file_input\" accept=\"image\/jpeg, image\/png, image\/gif, image\/webp\">\n            <span class=\"rakko_fav_upload_icon\">\u2b06\ufe0f<\/span>\n            <img id=\"rakko_fav_thumb\" class=\"rakko_fav_preview_thumb\" alt=\"\u30d7\u30ec\u30d3\u30e5\u30fc\">\n            <p class=\"rakko_fav_upload_text\" id=\"rakko_fav_upload_main_text\">\u753b\u50cf\u3092\u30c9\u30e9\u30c3\u30b0\uff06\u30c9\u30ed\u30c3\u30d7<\/p>\n            <p class=\"rakko_fav_upload_sub\">\u307e\u305f\u306f\u30af\u30ea\u30c3\u30af\u3057\u3066\u9078\u629e<br>\u5bfe\u5fdc\u5f62\u5f0f: JPG, PNG, GIF, WEBP<\/p>\n        <\/div>\n\n        <div class=\"rakko_fav_settings\">\n            <div class=\"rakko_fav_setting_group\">\n                <p class=\"rakko_fav_label\">\u51fa\u529b\u30b5\u30a4\u30ba<\/p>\n                <div class=\"rakko_fav_options\">\n                    <label class=\"rakko_fav_checkbox\"><input type=\"checkbox\" name=\"fav_size\" value=\"16\" checked> 16\u00d716<\/label>\n                    <label class=\"rakko_fav_checkbox\"><input type=\"checkbox\" name=\"fav_size\" value=\"32\" checked> 32\u00d732<\/label>\n                    <label class=\"rakko_fav_checkbox\"><input type=\"checkbox\" name=\"fav_size\" value=\"48\" checked> 48\u00d748<\/label>\n                    <label class=\"rakko_fav_checkbox\"><input type=\"checkbox\" name=\"fav_size\" value=\"180\"> 180\u00d7180 (iOS)<\/label>\n                    <label class=\"rakko_fav_checkbox\"><input type=\"checkbox\" name=\"fav_size\" value=\"192\"> 192\u00d7192 (Android)<\/label>\n                    <label class=\"rakko_fav_checkbox\"><input type=\"checkbox\" name=\"fav_size\" value=\"512\"> 512\u00d7512 (PWA)<\/label>\n                <\/div>\n            <\/div>\n\n            <div class=\"rakko_fav_setting_group\">\n                <p class=\"rakko_fav_label\">\u5f62\u72b6<\/p>\n                <div class=\"rakko_fav_options\">\n                    <label class=\"rakko_fav_radio\"><input type=\"radio\" name=\"fav_shape\" value=\"square\" checked> \u305d\u306e\u307e\u307e\uff08\u56db\u89d2\uff09<\/label>\n                    <label class=\"rakko_fav_radio\"><input type=\"radio\" name=\"fav_shape\" value=\"circle\"> \u5186\u5f62\u306b\u5207\u308a\u629c\u304d<\/label>\n                <\/div>\n            <\/div>\n        <\/div>\n\n        <button type=\"button\" id=\"rakko_fav_generate_btn\" class=\"rakko_fav_btn\">\u30d5\u30a1\u30d3\u30b3\u30f3\u3092\u4f5c\u6210\u3059\u308b<\/button>\n        <div id=\"rakko_fav_loading\" class=\"rakko_fav_loading\">\u51e6\u7406\u4e2d\u2026<\/div>\n    <\/div>\n\n    <div id=\"rakko_fav_result_block\">\n        <p class=\"rakko_fav_label\">\u30d7\u30ec\u30d3\u30e5\u30fc<\/p>\n        <div class=\"rakko_fav_preview_container\">\n            <div class=\"rakko_fav_preview_box rakko_fav_preview_light\">\n                <img id=\"rakko_fav_preview_img_light\" width=\"32\" height=\"32\" style=\"image-rendering: pixelated;\">\n                <span class=\"rakko_fav_preview_label\">\u30e9\u30a4\u30c8\u30e2\u30fc\u30c9<\/span>\n            <\/div>\n            <div class=\"rakko_fav_preview_box rakko_fav_preview_dark\">\n                <img id=\"rakko_fav_preview_img_dark\" width=\"32\" height=\"32\" style=\"image-rendering: pixelated;\">\n                <span class=\"rakko_fav_preview_label\">\u30c0\u30fc\u30af\u30e2\u30fc\u30c9<\/span>\n            <\/div>\n        <\/div>\n        \n        <div id=\"rakko_fav_visibility_warning\" class=\"rakko_fav_warning\">\n            \u26a0\ufe0f \u30c0\u30fc\u30af\u30e2\u30fc\u30c9\u3067\u898b\u3048\u306b\u304f\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\n        <\/div>\n\n        <div class=\"rakko_fav_download_area\">\n            <button type=\"button\" id=\"rakko_fav_dl_ico\" class=\"rakko_fav_btn rakko_fav_btn_dl primary\">\n                favicon.ico \u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\n            <\/button>\n            <button type=\"button\" id=\"rakko_fav_dl_zip\" class=\"rakko_fav_btn rakko_fav_btn_dl\">\n                PNG\u753b\u50cf\u30bb\u30c3\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\uff08ZIP\uff09\n            <\/button>\n        <\/div>\n\n        <div class=\"rakko_fav_reset_link\">\n            <button type=\"button\" id=\"rakko_fav_reset_btn\" class=\"rakko_fav_reset_btn\">\u4ed6\u306e\u753b\u50cf\u3067\u4f5c\u6210\u3059\u308b<\/button>\n        <\/div>\n    <\/div>\n<\/div>\n\n<script>\ndocument.addEventListener('DOMContentLoaded', function() {\n    \/\/ \u8981\u7d20\u53d6\u5f97\n    const dropzone = document.getElementById('rakko_fav_dropzone');\n    const fileInput = document.getElementById('rakko_fav_file_input');\n    const thumbImg = document.getElementById('rakko_fav_thumb');\n    const uploadMainText = document.getElementById('rakko_fav_upload_main_text');\n    const generateBtn = document.getElementById('rakko_fav_generate_btn');\n    const inputBlock = document.getElementById('rakko_fav_input_block');\n    const resultBlock = document.getElementById('rakko_fav_result_block');\n    const loadingMsg = document.getElementById('rakko_fav_loading');\n    const previewLight = document.getElementById('rakko_fav_preview_img_light');\n    const previewDark = document.getElementById('rakko_fav_preview_img_dark');\n    const warningBox = document.getElementById('rakko_fav_visibility_warning');\n    const resetBtn = document.getElementById('rakko_fav_reset_btn');\n    const dlIcoBtn = document.getElementById('rakko_fav_dl_ico');\n    const dlZipBtn = document.getElementById('rakko_fav_dl_zip');\n\n    \/\/ \u72b6\u614b\u7ba1\u7406\n    let originalImage = null;\n    let generatedBlobs = {}; \/\/ size: blob\n    let isGenerated = false;\n    const MAX_FILE_SIZE = 10 * 1024 * 1024; \/\/ 10MB\n\n    \/\/ --- \u30a4\u30d9\u30f3\u30c8\u30ea\u30b9\u30ca\u30fc ---\n\n    \/\/ \u30c9\u30e9\u30c3\u30b0\uff06\u30c9\u30ed\u30c3\u30d7\u52b9\u679c\n    dropzone.addEventListener('dragover', (e) => {\n        e.preventDefault();\n        dropzone.classList.add('dragover');\n    });\n    dropzone.addEventListener('dragleave', () => {\n        dropzone.classList.remove('dragover');\n    });\n    dropzone.addEventListener('drop', (e) => {\n        e.preventDefault();\n        dropzone.classList.remove('dragover');\n        if (e.dataTransfer.files.length > 0) {\n            handleFile(e.dataTransfer.files[0]);\n        }\n    });\n\n    \/\/ \u30d5\u30a1\u30a4\u30eb\u9078\u629e\n    fileInput.addEventListener('change', (e) => {\n        if (e.target.files.length > 0) {\n            handleFile(e.target.files[0]);\n        }\n    });\n\n    \/\/ \u751f\u6210\u30dc\u30bf\u30f3\n    generateBtn.addEventListener('click', async () => {\n        if (!originalImage) {\n            alert('\u753b\u50cf\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002');\n            return;\n        }\n        \n        startLoading();\n        \n        \/\/ UI\u30d6\u30ed\u30c3\u30af\u3092\u9632\u3050\u305f\u3081\u5c11\u3057\u9045\u5ef6\u3055\u305b\u308b\n        setTimeout(async () => {\n            try {\n                await generateFavicons();\n                showResult();\n            } catch (err) {\n                console.error(err);\n                alert('\u753b\u50cf\u306e\u751f\u6210\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002');\n            } finally {\n                stopLoading();\n            }\n        }, 50);\n    });\n\n    \/\/ \u30ea\u30bb\u30c3\u30c8\u30dc\u30bf\u30f3\n    resetBtn.addEventListener('click', () => {\n        resetTool();\n    });\n\n    \/\/ \u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u30dc\u30bf\u30f3\n    dlZipBtn.addEventListener('click', downloadZip);\n    dlIcoBtn.addEventListener('click', downloadIco);\n\n\n    \/\/ --- \u95a2\u6570\u7fa4 ---\n\n    function handleFile(file) {\n        \/\/ \u5bb9\u91cf\u30c1\u30a7\u30c3\u30af\n        if (file.size > MAX_FILE_SIZE) {\n            alert('\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u304c\u5927\u304d\u3059\u304e\u307e\u3059\uff08\u6700\u592710MB\uff09\u3002');\n            \/\/ fileInput\u3092\u30ea\u30bb\u30c3\u30c8\n            fileInput.value = '';\n            return;\n        }\n\n        \/\/ \u5f62\u5f0f\u30c1\u30a7\u30c3\u30af\n        const validTypes = ['image\/jpeg', 'image\/png', 'image\/gif', 'image\/webp'];\n        if (!validTypes.includes(file.type)) {\n            alert('\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u30d5\u30a1\u30a4\u30eb\u5f62\u5f0f\u3067\u3059\u3002JPG, PNG, GIF, WEBP\u306e\u307f\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002');\n            return;\n        }\n\n        const reader = new FileReader();\n        reader.onload = (e) => {\n            const img = new Image();\n            img.onload = () => {\n                originalImage = img;\n                \/\/ \u30b5\u30e0\u30cd\u30a4\u30eb\u8868\u793a\n                thumbImg.src = e.target.result;\n                thumbImg.style.display = 'block';\n                uploadMainText.style.display = 'none';\n                \n                \/\/ \u9078\u629e\u6e08\u307f\u72b6\u614b\u306eUI\u3078\n                if(isGenerated) {\n                    resultBlock.style.display = 'none';\n                    isGenerated = false;\n                }\n            };\n            img.onerror = () => {\n                alert('\u753b\u50cf\u306e\u8aad\u307f\u8fbc\u307f\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002');\n            };\n            img.src = e.target.result;\n        };\n        reader.readAsDataURL(file);\n    }\n\n    async function generateFavicons() {\n        generatedBlobs = {};\n        const sizes = Array.from(document.querySelectorAll('input[name=\"fav_size\"]:checked')).map(cb => parseInt(cb.value));\n        const shape = document.querySelector('input[name=\"fav_shape\"]:checked').value;\n\n        if (sizes.length === 0) {\n            alert('\u30b5\u30a4\u30ba\u3092\u5c11\u306a\u304f\u3068\u30821\u3064\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002');\n            throw new Error('No size selected');\n        }\n\n        \/\/ \u57fa\u672c\u306e\u6b63\u65b9\u5f62\u30af\u30ed\u30c3\u30d7\u30ad\u30e3\u30f3\u30d0\u30b9\u4f5c\u6210\n        const cropSize = Math.min(originalImage.width, originalImage.height);\n        const sourceX = (originalImage.width - cropSize) \/ 2;\n        const sourceY = (originalImage.height - cropSize) \/ 2;\n\n        for (const size of sizes) {\n            const canvas = document.createElement('canvas');\n            canvas.width = size;\n            canvas.height = size;\n            const ctx = canvas.getContext('2d');\n            \n            \/\/ \u6ed1\u3089\u304b\u306a\u30ea\u30b5\u30a4\u30ba\u306e\u305f\u3081\u306b\n            ctx.imageSmoothingEnabled = true;\n            ctx.imageSmoothingQuality = 'high';\n\n            \/\/ 1. \u30ea\u30b5\u30a4\u30ba\u63cf\u753b\uff08\u30af\u30ed\u30c3\u30d7\u542b\u3080\uff09\n            ctx.drawImage(originalImage, sourceX, sourceY, cropSize, cropSize, 0, 0, size, size);\n\n            \/\/ 2. \u5186\u5f62\u5207\u308a\u629c\u304d\uff08\u9078\u629e\u6642\uff09\n            if (shape === 'circle') {\n                const tempCanvas = document.createElement('canvas');\n                tempCanvas.width = size;\n                tempCanvas.height = size;\n                const tempCtx = tempCanvas.getContext('2d');\n                \n                tempCtx.imageSmoothingEnabled = true;\n                tempCtx.imageSmoothingQuality = 'high';\n\n                \/\/ \u5186\u5f62\u30de\u30b9\u30af\u4f5c\u6210\n                tempCtx.beginPath();\n                tempCtx.arc(size\/2, size\/2, size\/2, 0, Math.PI * 2);\n                tempCtx.closePath();\n                tempCtx.fill();\n\n                \/\/ \u5408\u6210\uff1a \u5143\u753b\u50cf\u306e\u4e0a\u306b\u5186\u5f62\u30de\u30b9\u30af\u3092\u91cd\u306d\u3066\u3001\u91cd\u306a\u3063\u305f\u90e8\u5206\u3060\u3051\u6b8b\u3059\n                ctx.globalCompositeOperation = 'destination-in';\n                ctx.drawImage(tempCanvas, 0, 0);\n                ctx.globalCompositeOperation = 'source-over'; \/\/ \u623b\u3059\n            }\n\n            \/\/ 3. Blob\u5316\u3057\u3066\u4fdd\u5b58\n            const blob = await new Promise(resolve => canvas.toBlob(resolve, 'image\/png'));\n            generatedBlobs[size] = blob;\n        }\n\n        \/\/ \u30d7\u30ec\u30d3\u30e5\u30fc\u66f4\u65b0 (32px\u307e\u305f\u306f\u305d\u308c\u306b\u8fd1\u3044\u3082\u306e\u3092\u4f7f\u7528)\n        const previewSize = sizes.includes(32) ? 32 : sizes[0];\n        const previewUrl = URL.createObjectURL(generatedBlobs[previewSize]);\n        previewLight.src = previewUrl;\n        previewDark.src = previewUrl;\n\n        \/\/ \u8996\u8a8d\u6027\u30c1\u30a7\u30c3\u30af\n        checkVisibility(generatedBlobs[previewSize]);\n    }\n\n    \/\/ \u8996\u8a8d\u6027\u30c1\u30a7\u30c3\u30af\uff08\u30c0\u30fc\u30af\u30e2\u30fc\u30c9\u3067\u306e\u898b\u3048\u306b\u304f\u3055\u5224\u5b9a\uff09\n    function checkVisibility(blob) {\n        const img = new Image();\n        img.onload = () => {\n            const canvas = document.createElement('canvas');\n            canvas.width = img.width;\n            canvas.height = img.height;\n            const ctx = canvas.getContext('2d');\n            ctx.drawImage(img, 0, 0);\n            \n            const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);\n            const data = imageData.data;\n            let r, g, b, a;\n            let totalBrightness = 0;\n            let pixelCount = 0;\n\n            for (let i = 0; i < data.length; i += 4) {\n                r = data[i];\n                g = data[i + 1];\n                b = data[i + 2];\n                a = data[i + 3];\n\n                if (a > 128) { \/\/ \u900f\u660e\u3067\u306a\u3044\u30d4\u30af\u30bb\u30eb\u306e\u307f\n                    \/\/ \u8f1d\u5ea6\u8a08\u7b97\n                    const brightness = (r * 299 + g * 587 + b * 114) \/ 1000;\n                    totalBrightness += brightness;\n                    pixelCount++;\n                }\n            }\n\n            if (pixelCount > 0) {\n                const avgBrightness = totalBrightness \/ pixelCount;\n                \/\/ \u8f1d\u5ea6\u304c\u4f4e\u3044\uff08\u6697\u3044\uff09\u5834\u5408\u3001\u8b66\u544a\n                if (avgBrightness < 50) {\n                    warningBox.style.display = 'flex';\n                } else {\n                    warningBox.style.display = 'none';\n                }\n            }\n        };\n        img.src = URL.createObjectURL(blob);\n    }\n\n    function showResult() {\n        isGenerated = true;\n        resultBlock.style.display = 'block';\n        resultBlock.scrollIntoView({ behavior: 'smooth' });\n    }\n\n    function resetTool() {\n        originalImage = null;\n        generatedBlobs = {};\n        isGenerated = false;\n        \n        fileInput.value = '';\n        thumbImg.src = '';\n        thumbImg.style.display = 'none';\n        uploadMainText.style.display = 'block';\n        \n        resultBlock.style.display = 'none';\n        warningBox.style.display = 'none';\n    }\n\n    function startLoading() {\n        generateBtn.disabled = true;\n        loadingMsg.style.display = 'block';\n    }\n\n    function stopLoading() {\n        generateBtn.disabled = false;\n        loadingMsg.style.display = 'none';\n    }\n\n    \/\/ ZIP\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u51e6\u7406\n    async function downloadZip() {\n        if (!window.JSZip) {\n            alert('ZIP\u4f5c\u6210\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u8aad\u307f\u8fbc\u307f\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002');\n            return;\n        }\n        const zip = new JSZip();\n        for (const [size, blob] of Object.entries(generatedBlobs)) {\n            zip.file(`favicon-${size}x${size}.png`, blob);\n        }\n        \n        const content = await zip.generateAsync({type:\"blob\"});\n        const link = document.createElement('a');\n        link.href = URL.createObjectURL(content);\n        link.download = \"favicon-images.zip\";\n        link.click();\n    }\n\n    \/\/ ICO\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u51e6\u7406\n    async function downloadIco() {\n        \/\/ ICO\u306b\u306f\u901a\u5e38 16, 32, 48 \u304c\u542b\u307e\u308c\u308b\u306e\u304c\u671b\u307e\u3057\u3044\n        const icoSizes = [16, 32, 48];\n        const pngBlobs = [];\n\n        \/\/ \u73fe\u5728\u306egeneratedBlobs\u306b\u3042\u308b\u304b\u78ba\u8a8d\u3001\u306a\u3051\u308c\u3070\u4e00\u6642\u7684\u306b\u4f5c\u6210\n        for (const size of icoSizes) {\n            let blob = generatedBlobs[size];\n            if (!blob) {\n                \/\/ \u30b5\u30a4\u30ba\u304c\u751f\u6210\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u3001\u3053\u3053\u3067\u4f5c\u6210\u3059\u308b\n                const canvas = document.createElement('canvas');\n                canvas.width = size;\n                canvas.height = size;\n                const ctx = canvas.getContext('2d');\n                ctx.imageSmoothingEnabled = true;\n                ctx.imageSmoothingQuality = 'high';\n                \n                const cropSize = Math.min(originalImage.width, originalImage.height);\n                const sourceX = (originalImage.width - cropSize) \/ 2;\n                const sourceY = (originalImage.height - cropSize) \/ 2;\n                \n                ctx.drawImage(originalImage, sourceX, sourceY, cropSize, cropSize, 0, 0, size, size);\n                \n                const shape = document.querySelector('input[name=\"fav_shape\"]:checked').value;\n                if (shape === 'circle') {\n                    const tempCanvas = document.createElement('canvas');\n                    tempCanvas.width = size;\n                    tempCanvas.height = size;\n                    const tempCtx = tempCanvas.getContext('2d');\n                    tempCtx.beginPath();\n                    tempCtx.arc(size\/2, size\/2, size\/2, 0, Math.PI * 2);\n                    tempCtx.closePath();\n                    tempCtx.fill();\n                    ctx.globalCompositeOperation = 'destination-in';\n                    ctx.drawImage(tempCanvas, 0, 0);\n                    ctx.globalCompositeOperation = 'source-over';\n                }\n                blob = await new Promise(r => canvas.toBlob(r, 'image\/png'));\n            }\n            pngBlobs.push(blob);\n        }\n\n        const icoBlob = await pngsToIco(pngBlobs);\n        \n        const link = document.createElement('a');\n        link.href = URL.createObjectURL(icoBlob);\n        link.download = \"favicon.ico\";\n        link.click();\n    }\n\n    \/\/ \u8907\u6570\u306ePNG Blob\u304b\u3089ICO\u30d5\u30a1\u30a4\u30eb\u3092\u751f\u6210\u3059\u308b\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\n    async function pngsToIco(pngBlobs) {\n        const headerSize = 6;\n        const directorySize = 16;\n        let offset = headerSize + (directorySize * pngBlobs.length);\n        \n        const buffers = [];\n        const directories = [];\n\n        \/\/ \u30d8\u30c3\u30c0\u30fc\u4f5c\u6210 (Reserved=0, Type=1(ICO), Count=\u679a\u6570)\n        const header = new DataView(new ArrayBuffer(6));\n        header.setUint16(0, 0, true);\n        header.setUint16(2, 1, true);\n        header.setUint16(4, pngBlobs.length, true);\n\n        for (const blob of pngBlobs) {\n            const buffer = await blob.arrayBuffer();\n            \n            const imgBitmap = await createImageBitmap(blob);\n            const width = imgBitmap.width >= 256 ? 0 : imgBitmap.width;\n            const height = imgBitmap.height >= 256 ? 0 : imgBitmap.height;\n            const size = buffer.byteLength;\n\n            const dir = new DataView(new ArrayBuffer(16));\n            dir.setUint8(0, width);  \/\/ Width\n            dir.setUint8(1, height); \/\/ Height\n            dir.setUint8(2, 0);      \/\/ Colors\n            dir.setUint8(3, 0);      \/\/ Reserved\n            dir.setUint16(4, 1, true); \/\/ Planes\n            dir.setUint16(6, 32, true); \/\/ BPP\n            dir.setUint32(8, size, true); \/\/ Size\n            dir.setUint32(12, offset, true); \/\/ Offset\n\n            directories.push(dir.buffer);\n            buffers.push(buffer);\n            offset += size;\n        }\n\n        \/\/ \u5168\u30d0\u30c3\u30d5\u30a1\u7d50\u5408\n        const finalBuffer = new Uint8Array(offset);\n        let pos = 0;\n        \n        \/\/ Header\n        finalBuffer.set(new Uint8Array(header.buffer), pos);\n        pos += 6;\n\n        \/\/ Directories\n        for (const dir of directories) {\n            finalBuffer.set(new Uint8Array(dir), pos);\n            pos += 16;\n        }\n\n        \/\/ Image Data\n        for (const buf of buffers) {\n            finalBuffer.set(new Uint8Array(buf), pos);\n            pos += buf.byteLength;\n        }\n\n        return new Blob([finalBuffer], { type: 'image\/x-icon' });\n    }\n});\n<\/script>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>\u30d6\u30e9\u30a6\u30b6\u4e0a\u3067JPEG\u30fbPNG\u30fbGIF\u30fbWebP\u306a\u3069\u306e\u753b\u50cf\u3092\u3001\u30d5\u30a1\u30d3\u30b3\u30f3\uff08.ico\uff09\u3084Web\u30b5\u30a4\u30c8\u7528\u30a2\u30a4\u30b3\u30f3\uff08.png\uff09\u3078\u77ac\u6642\u306b\u5909\u63db\u30fb\u4f5c\u6210\u3067\u304d\u308b\u7121\u6599WEB\u30c4\u30fc\u30eb\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>\u3053\u306e\u30c4\u30fc\u30eb\u306f\u3001\u304a\u624b\u6301\u3061\u306e\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u3092\u3001Web\u30b5\u30a4\u30c8\u306e\u30b7\u30f3\u30dc\u30eb\u30de\u30fc\u30af\u3067\u3042\u308b\u300c\u30d5\u30a1\u30d3\u30b3\u30f3\uff08favicon.ico\uff09\u300d\u3084\u3001\u30b9\u30de\u30db\u30fb\u30bf\u30d6\u30ec\u30c3\u30c8\u7528\u306e\u300c\u30a2\u30a4\u30b3\u30f3\u753b\u50cf\uff08.png\uff09\u300d\u306b\u5909\u63db\u3059\u308b\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u30fc\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u4e3b\u306a\u6a5f\u80fd<\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30de\u30eb\u30c1\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5bfe\u5fdc:<\/strong> JPG\u3001PNG\u3001GIF\u306b\u52a0\u3048\u3001\u6700\u65b0\u306eWebP\u5f62\u5f0f\u306e\u753b\u50cf\u3082\u8aad\u307f\u8fbc\u307f\u53ef\u80fd\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>.ico\u3068.png\u3092\u4e00\u62ec\u751f\u6210:<\/strong> \u30d6\u30e9\u30a6\u30b6\u306e\u30bf\u30d6\u7528\u300c.ico\u300d\u3060\u3051\u3067\u306a\u304f\u3001meta\u30bf\u30b0\u3067\u57cb\u3081\u8fbc\u3080\u305f\u3081\u306e\u9ad8\u753b\u8cea\u306a\u300c.png\u300d\u30d5\u30a1\u30a4\u30eb\u3082\u540c\u6642\u306b\u751f\u6210\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30b9\u30de\u30db\u5bfe\u5fdc\u30b5\u30a4\u30ba\u3082\u5b8c\u5099:<\/strong> \u30d1\u30bd\u30b3\u30f3\u7528\u3060\u3051\u3067\u306a\u304f\u3001iPhone\/iPad\u7528\uff08apple-touch-icon\uff09\u3001Android\u7528\uff08android-chrome\uff09\u306a\u3069\u306e\u30b9\u30de\u30db\u5bfe\u5fdc\u30b5\u30a4\u30ba\u3082\u7db2\u7f85\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u5f62\u72b6\u306e\u81ea\u52d5\u52a0\u5de5:<\/strong> \u6b63\u65b9\u5f62\u306e\u753b\u50cf\u3092\u305d\u306e\u307e\u307e\u4f7f\u3046\u3060\u3051\u3067\u306a\u304f\u3001\u81ea\u52d5\u3067\u300c\u5186\u5f62\uff08\u4e38\u30a2\u30a4\u30b3\u30f3\uff09\u300d\u306b\u5207\u308a\u629c\u3044\u3066\u80cc\u666f\u3092\u900f\u904e\u3055\u305b\u308b\u52a0\u5de5\u304c\u53ef\u80fd\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u5b89\u5fc3\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3:<\/strong> \u753b\u50cf\u51e6\u7406\u306f\u304a\u5ba2\u69d8\u306e\u30d6\u30e9\u30a6\u30b6\uff08\u7aef\u672b\u5185\uff09\u3067\u884c\u308f\u308c\u307e\u3059\u3002\u30b5\u30fc\u30d0\u30fc\u3078\u753b\u50cf\u30c7\u30fc\u30bf\u304c\u9001\u4fe1\u30fb\u4fdd\u5b58\u3055\u308c\u308b\u3053\u3068\u306f\u306a\u3044\u305f\u3081\u3001\u672a\u516c\u958b\u306e\u30ed\u30b4\u30c7\u30fc\u30bf\u3067\u3082\u5b89\u5fc3\u3057\u3066\u3054\u5229\u7528\u3044\u305f\u3060\u3051\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-1\">\u30d5\u30a1\u30d3\u30b3\u30f3\uff08favicon\uff09\u3068\u306f\uff1f\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<p>\u30d5\u30a1\u30d3\u30b3\u30f3\u3068\u306f\u300cFavorite Icon\u300d\u306e\u7565\u3067\u3001Web\u30b5\u30a4\u30c8\u306e\u30b7\u30f3\u30dc\u30eb\u3068\u306a\u308b\u5c0f\u3055\u306a\u30a2\u30a4\u30b3\u30f3\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3069\u3053\u306b\u8868\u793a\u3055\u308c\u308b\uff1f<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d6\u30e9\u30a6\u30b6\u306e\u30bf\u30d6\uff08\u30da\u30fc\u30b8\u30bf\u30a4\u30c8\u30eb\u306e\u6a2a\uff09<\/li>\n\n\n\n<li>\u30d6\u30c3\u30af\u30de\u30fc\u30af\uff08\u304a\u6c17\u306b\u5165\u308a\uff09\u4e00\u89a7<\/li>\n\n\n\n<li>\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u306e\u30db\u30fc\u30e0\u753b\u9762\uff08\u30b7\u30e7\u30fc\u30c8\u30ab\u30c3\u30c8\u8ffd\u52a0\u6642\uff09<\/li>\n\n\n\n<li>Google\u306e\u691c\u7d22\u7d50\u679c\u753b\u9762\uff08\u30b9\u30de\u30db\u7248\u306a\u3069\uff09<\/li>\n<\/ul>\n\n\n\n<p><strong>\u306a\u305c\u5fc5\u8981\u306a\u306e\uff1f<\/strong> \u30d5\u30a1\u30d3\u30b3\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u305f\u304f\u3055\u3093\u306e\u30bf\u30d6\u3092\u958b\u3044\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u304c\u300c\u3069\u306e\u30bf\u30d6\u304c\u3042\u306a\u305f\u306e\u30b5\u30a4\u30c8\u304b\u300d\u3092\u3072\u3068\u76ee\u3067\u8a8d\u8b58\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u30b5\u30a4\u30c8\u306e\u4fe1\u983c\u6027\u3084\u30d6\u30e9\u30f3\u30c9\u30a4\u30e1\u30fc\u30b8\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u3082\u5fc5\u9808\u306e\u8a2d\u5b9a\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-2\">\u3053\u306e\u30c4\u30fc\u30eb\u304c\u5f79\u7acb\u3064\u306e\u306f\u3069\u3093\u306a\u3068\u304d\uff1f<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Web\u30b5\u30a4\u30c8\u3092\u65b0\u898f\u4f5c\u6210\u30fb\u30ea\u30cb\u30e5\u30fc\u30a2\u30eb\u3059\u308b\u3068\u304d<\/strong> 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