{"id":14578,"date":"2026-06-08T16:17:28","date_gmt":"2026-06-08T07:17:28","guid":{"rendered":"https:\/\/rakkokeyword.com\/techo\/?p=14578"},"modified":"2026-06-08T16:17:28","modified_gmt":"2026-06-08T07:17:28","slug":"tool-qr-decode","status":"publish","type":"post","link":"https:\/\/rakkokeyword.com\/techo\/tool-qr-decode\/","title":{"rendered":"QR\u30b3\u30fc\u30c9URL\u5316\u30c4\u30fc\u30eb"},"content":{"rendered":"\n<div class=\"qr-decode-tool-container\">\n    <!-- \u30e9\u30a4\u30d6\u30e9\u30ea\u8aad\u307f\u8fbc\u307f -->\n    <script src=\"https:\/\/media-api.qcdgv19414.rakkoserver.net\/lib\/jsQR.min.js\"><\/script>\n    \n    <style>\n        \/* CSS *\/\n        .qr-decode-tool-container {\n            width: 100%;\n            max-width: 720px;\n            margin: 0 auto;\n            font-family: sans-serif;\n            color: #333;\n            box-sizing: border-box;\n        }\n        .qr-decode-tool-container * {\n            box-sizing: border-box;\n        }\n        .qr-decode-tool-drop-zone {\n            border: 2px dashed #ccc;\n            border-radius: 8px;\n            padding: 40px 20px;\n            text-align: center;\n            background-color: #f9f9f9;\n            transition: background-color 0.3s;\n            margin-bottom: 20px;\n        }\n        .qr-decode-tool-drop-zone.qr-decode-tool-dragover {\n            background-color: #e0e0e0;\n            border-color: #999;\n        }\n        .qr-decode-tool-drop-text {\n            margin: 0 0 10px 0;\n            font-size: 16px;\n            font-weight: bold;\n        }\n        .qr-decode-tool-drop-subtext {\n            margin: 0 0 15px 0;\n            font-size: 14px;\n            color: #666;\n        }\n        .qr-decode-tool-btn {\n            display: inline-flex;\n            align-items: center;\n            justify-content: center;\n            height: 44px;\n            padding: 0 24px;\n            font-size: 16px;\n            border: none;\n            border-radius: 4px;\n            cursor: pointer;\n            text-decoration: none;\n            transition: opacity 0.2s;\n        }\n        .qr-decode-tool-btn:hover {\n            opacity: 0.8;\n        }\n        .qr-decode-tool-btn-primary {\n            background-color: #13284B;\n            color: #fff;\n        }\n        .qr-decode-tool-error {\n            color: #d32f2f;\n            background-color: #ffebee;\n            padding: 12px;\n            border-radius: 4px;\n            margin-bottom: 20px;\n            font-size: 14px;\n        }\n        .qr-decode-tool-result-area {\n            display: flex;\n            flex-direction: column;\n            gap: 20px;\n            margin-bottom: 20px;\n        }\n        @media (min-width: 600px) {\n            .qr-decode-tool-result-area {\n                flex-direction: row;\n            }\n            .qr-decode-tool-preview-container {\n                flex: 1;\n                max-width: 220px;\n            }\n            .qr-decode-tool-output-container {\n                flex: 2;\n            }\n        }\n        .qr-decode-tool-label {\n            margin: 0 0 8px 0;\n            font-size: 14px;\n            color: #555;\n        }\n        .qr-decode-tool-bold {\n            font-weight: bold;\n            font-size: 16px;\n            color: #000;\n        }\n        .qr-decode-tool-preview-img {\n            max-width: 100%;\n            height: auto;\n            border: 1px solid #ddd;\n            border-radius: 4px;\n            display: block;\n        }\n        .qr-decode-tool-result-text {\n            width: 100%;\n            height: 120px;\n            padding: 12px;\n            border: 1px solid #ccc;\n            border-radius: 4px;\n            resize: vertical;\n            font-size: 16px;\n            margin-bottom: 12px;\n            background-color: #f5f5f5;\n            color: #333;\n            word-break: break-all;\n        }\n        .qr-decode-tool-actions {\n            display: flex;\n            gap: 10px;\n            flex-wrap: wrap;\n            margin-bottom: 12px;\n        }\n        .qr-decode-tool-toast {\n            position: fixed;\n            bottom: 30px;\n            left: 50%;\n            transform: translateX(-50%);\n            background-color: #333;\n            color: #fff;\n            padding: 12px 24px;\n            border-radius: 24px;\n            font-size: 14px;\n            opacity: 0;\n            visibility: hidden;\n            transition: opacity 0.3s, visibility 0.3s;\n            z-index: 9999;\n        }\n        .qr-decode-tool-toast.qr-decode-tool-show {\n            opacity: 1;\n            visibility: visible;\n        }\n        .qr-decode-tool-note {\n            margin: 16px 0 0 0;\n            font-size: 12px;\n            color: #666;\n            text-align: left;\n            line-height: 1.4;\n        }\n    <\/style>\n\n    <!-- \u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u30a8\u30ea\u30a2 -->\n    <div id=\"qr-decode-tool-drop-zone\" class=\"qr-decode-tool-drop-zone\">\n        <p class=\"qr-decode-tool-drop-text\">\u3053\u3053\u306bQR\u30b3\u30fc\u30c9\u753b\u50cf\u3092\u30c9\u30e9\u30c3\u30b0\uff06\u30c9\u30ed\u30c3\u30d7<\/p>\n        <p class=\"qr-decode-tool-drop-subtext\">\u307e\u305f\u306f<\/p>\n        <button type=\"button\" id=\"qr-decode-tool-select-btn\" class=\"qr-decode-tool-btn qr-decode-tool-btn-primary\">\u30d5\u30a1\u30a4\u30eb\u3092\u9078\u629e<\/button>\n        <input type=\"file\" id=\"qr-decode-tool-file-input\" accept=\"image\/*\" style=\"display:none;\">\n    <\/div>\n\n    <!-- \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8 -->\n    <p id=\"qr-decode-tool-error-msg\" class=\"qr-decode-tool-error\" style=\"display:none;\"><\/p>\n\n    <!-- \u7d50\u679c\u8868\u793a\u30a8\u30ea\u30a2 -->\n    <div id=\"qr-decode-tool-result-area\" class=\"qr-decode-tool-result-area\" style=\"display:none;\">\n        <div class=\"qr-decode-tool-preview-container\">\n            <p class=\"qr-decode-tool-label\">\u753b\u50cf\u30d7\u30ec\u30d3\u30e5\u30fc<\/p>\n            <img decoding=\"async\" id=\"qr-decode-tool-preview-img\" src=\"\" alt=\"\u30d7\u30ec\u30d3\u30e5\u30fc\" class=\"qr-decode-tool-preview-img\">\n        <\/div>\n        \n        <div class=\"qr-decode-tool-output-container\">\n            <p class=\"qr-decode-tool-label qr-decode-tool-bold\">\u8aad\u307f\u53d6\u308a\u7d50\u679c<\/p>\n            <textarea id=\"qr-decode-tool-result-text\" class=\"qr-decode-tool-result-text\" readonly><\/textarea>\n            <div class=\"qr-decode-tool-actions\">\n                <button type=\"button\" id=\"qr-decode-tool-copy-btn\" class=\"qr-decode-tool-btn qr-decode-tool-btn-primary\">\u7d50\u679c\u3092\u30b3\u30d4\u30fc<\/button>\n                <button type=\"button\" id=\"qr-decode-tool-open-btn\" class=\"qr-decode-tool-btn qr-decode-tool-btn-primary\" style=\"display:none;\">\u30ea\u30f3\u30af\u5148\u3092\u958b\u304f<\/button>\n            <\/div>\n            <p class=\"qr-decode-tool-note\">\u203bQR\u30b3\u30fc\u30c9\u306b\u77ed\u7e2eURL\uff08bit.ly\u3001t.co \u306a\u3069\uff09\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u77ed\u7e2eURL\u306e\u307e\u307e\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n        <\/div>\n    <\/div>\n\n    <!-- \u30c8\u30fc\u30b9\u30c8\u901a\u77e5 -->\n    <div id=\"qr-decode-tool-toast\" class=\"qr-decode-tool-toast\">\u30b3\u30d4\u30fc\u3057\u307e\u3057\u305f<\/div>\n    \n    <!-- \u753b\u50cf\u89e3\u6790\u7528\u975e\u8868\u793aCanvas -->\n    <canvas id=\"qr-decode-tool-canvas\" style=\"display:none;\"><\/canvas>\n\n    <script>\n        document.addEventListener('DOMContentLoaded', function() {\n            const pfx = 'qr-decode-tool-';\n            const dropZone = document.getElementById(pfx + 'drop-zone');\n            const fileInput = document.getElementById(pfx + 'file-input');\n            const selectBtn = document.getElementById(pfx + 'select-btn');\n            const errorMsg = document.getElementById(pfx + 'error-msg');\n            const resultArea = document.getElementById(pfx + 'result-area');\n            const previewImg = document.getElementById(pfx + 'preview-img');\n            const resultText = document.getElementById(pfx + 'result-text');\n            const copyBtn = document.getElementById(pfx + 'copy-btn');\n            const openBtn = document.getElementById(pfx + 'open-btn');\n            const toast = document.getElementById(pfx + 'toast');\n            const canvas = document.getElementById(pfx + 'canvas');\n            \n            \/\/ canvas\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306e\u30a8\u30e9\u30fc\u3092\u9632\u6b62\n            if (!canvas) return;\n            const ctx = canvas.getContext('2d', { willReadFrequently: true });\n\n            let currentValidUrl = '';\n\n            \/\/ \u30a8\u30b9\u30b1\u30fc\u30d7\u51e6\u7406\uff08\u6307\u793a\u6307\u5b9a\u306e\u5206\u5272\u7d50\u5408\u5f62\u5f0f\uff09\n            const escapeHTML = function(str) {\n                if (typeof str !== 'string') return '';\n                return str.replace(\/[&'`\"<>]\/g, function(match) {\n                    switch(match) {\n                        case '&': return '&' + 'amp;';\n                        case \"'\": return '&' + '#x27;';\n                        case '`': return '&' + '#x60;';\n                        case '\"': return '&' + 'quot;';\n                        case '<': return '&#038;' + 'lt;';\n                        case '>': return '&' + 'gt;';\n                        default: return match;\n                    }\n                });\n            };\n\n            const showError = function(msg) {\n                errorMsg.textContent = msg;\n                errorMsg.style.display = 'block';\n                resultArea.style.display = 'none';\n                fileInput.value = '';\n            };\n\n            const hideError = function() {\n                errorMsg.style.display = 'none';\n            };\n\n            const showToast = function(msg) {\n                toast.textContent = msg;\n                toast.classList.add(pfx + 'show');\n                setTimeout(function() {\n                    toast.classList.remove(pfx + 'show');\n                }, 3000);\n            };\n\n            \/\/ \u753b\u50cf\u306e\u8aad\u307f\u8fbc\u307f\u3068\u89e3\u6790\u51e6\u7406\n            const processImage = function(file) {\n                hideError();\n                if (!file) return;\n\n                if (!file.type.match(\/^image\\\/\/)) {\n                    showError('\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044');\n                    return;\n                }\n\n                const reader = new FileReader();\n                reader.onload = function(e) {\n                    const img = new Image();\n                    img.onload = function() {\n                        previewImg.src = img.src;\n\n                        \/\/ \u5de8\u5927\u753b\u50cf\u306b\u3088\u308b\u30e1\u30e2\u30ea\u67af\u6e07\u9632\u6b62\u306e\u30ea\u30b5\u30a4\u30ba\n                        let width = img.width;\n                        let height = img.height;\n                        const maxDim = 2000;\n                        if (width > maxDim || height > maxDim) {\n                            const ratio = Math.min(maxDim \/ width, maxDim \/ height);\n                            width = Math.floor(width * ratio);\n                            height = Math.floor(height * ratio);\n                        }\n\n                        canvas.width = width;\n                        canvas.height = height;\n                        ctx.clearRect(0, 0, width, height);\n                        ctx.drawImage(img, 0, 0, width, height);\n\n                        let imageData;\n                        try {\n                            imageData = ctx.getImageData(0, 0, width, height);\n                        } catch (err) {\n                            showError('\u753b\u50cf\u306e\u8aad\u307f\u8fbc\u307f\u306b\u5931\u6557\u3057\u307e\u3057\u305f');\n                            return;\n                        }\n\n                        if (typeof jsQR !== 'undefined') {\n                            \/\/ 1\u56de\u76ee\u306e\u89e3\u6790\n                            const code = jsQR(imageData.data, imageData.width, imageData.height, {\n                                inversionAttempts: \"dontInvert\",\n                            });\n\n                            if (code) {\n                                displayResult(code.data);\n                            } else {\n                                \/\/ \u5931\u6557\u6642\u306f\u53cd\u8ee2\u30e2\u30fc\u30c9\u3067\u518d\u8a66\u884c\n                                const codeInvert = jsQR(imageData.data, imageData.width, imageData.height, {\n                                    inversionAttempts: \"attemptBoth\",\n                                });\n                                if (codeInvert) {\n                                    displayResult(codeInvert.data);\n                                } else {\n                                    showError('QR\u30b3\u30fc\u30c9\u3092\u8aad\u307f\u53d6\u308c\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u5225\u306e\u753b\u50cf\u3092\u304a\u8a66\u3057\u304f\u3060\u3055\u3044\u3002');\n                                }\n                            }\n                        } else {\n                            showError('\u30b7\u30b9\u30c6\u30e0\u30a8\u30e9\u30fc\uff1a\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u8aad\u307f\u8fbc\u307e\u308c\u3066\u3044\u307e\u305b\u3093\u3002');\n                        }\n                    };\n                    img.onerror = function() {\n                        showError('\u753b\u50cf\u306e\u8aad\u307f\u8fbc\u307f\u306b\u5931\u6557\u3057\u307e\u3057\u305f');\n                    };\n                    img.src = e.target.result;\n                };\n                reader.onerror = function() {\n                    showError('\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u306b\u5931\u6557\u3057\u307e\u3057\u305f');\n                };\n                reader.readAsDataURL(file);\n            };\n\n            \/\/ \u7d50\u679c\u306e\u8868\u793a\u5236\u5fa1\n            const displayResult = function(data) {\n                resultText.value = data;\n                resultArea.style.display = 'flex';\n\n                \/\/ http(s):\/\/\u304b\u3089\u59cb\u307e\u308b\u5834\u5408\u306e\u307f\u30ea\u30f3\u30af\u30dc\u30bf\u30f3\u3092\u8868\u793a\n                if (\/^https?:\\\/\\\/\/i.test(data)) {\n                    currentValidUrl = data;\n                    openBtn.style.display = 'inline-flex';\n                } else {\n                    currentValidUrl = '';\n                    openBtn.style.display = 'none';\n                }\n            };\n\n            \/\/ \u30a4\u30d9\u30f3\u30c8\u30ea\u30b9\u30ca\u30fc\n            if(selectBtn) {\n                selectBtn.addEventListener('click', function() {\n                    fileInput.click();\n                });\n            }\n\n            if(fileInput) {\n                fileInput.addEventListener('change', function(e) {\n                    if (e.target.files && e.target.files.length > 0) {\n                        processImage(e.target.files[0]);\n                    }\n                });\n            }\n\n            if(dropZone) {\n                dropZone.addEventListener('dragover', function(e) {\n                    e.preventDefault();\n                    e.stopPropagation();\n                    dropZone.classList.add(pfx + 'dragover');\n                });\n\n                dropZone.addEventListener('dragleave', function(e) {\n                    e.preventDefault();\n                    e.stopPropagation();\n                    dropZone.classList.remove(pfx + 'dragover');\n                });\n\n                dropZone.addEventListener('drop', function(e) {\n                    e.preventDefault();\n                    e.stopPropagation();\n                    dropZone.classList.remove(pfx + 'dragover');\n                    if (e.dataTransfer.files && e.dataTransfer.files.length > 0) {\n                        processImage(e.dataTransfer.files[0]);\n                    }\n                });\n            }\n\n            \/\/ \u30b3\u30d4\u30fc\u6a5f\u80fd\n            const fallbackCopyTextToClipboard = function() {\n                if(!resultText) return;\n                resultText.select();\n                try {\n                    document.execCommand('copy');\n                    showToast('\u30b3\u30d4\u30fc\u3057\u307e\u3057\u305f');\n                } catch (err) {\n                    \/\/ \u4f55\u3082\u3057\u306a\u3044\n                }\n                if(window.getSelection) {\n                    window.getSelection().removeAllRanges();\n                }\n            };\n\n            if(copyBtn) {\n                copyBtn.addEventListener('click', function() {\n                    if (navigator.clipboard && navigator.clipboard.writeText) {\n                        navigator.clipboard.writeText(resultText.value).then(function() {\n                            showToast('\u30b3\u30d4\u30fc\u3057\u307e\u3057\u305f');\n                        }).catch(function() {\n                            fallbackCopyTextToClipboard();\n                        });\n                    } else {\n                        fallbackCopyTextToClipboard();\n                    }\n                });\n            }\n\n            \/\/ \u30ea\u30f3\u30af\u5148\u3092\u958b\u304f\u6a5f\u80fd\n            if(openBtn) {\n                openBtn.addEventListener('click', function() {\n                    if (currentValidUrl) {\n                        window.open(currentValidUrl, '_blank');\n                    }\n                });\n            }\n        });\n    <\/script>\n<\/div>\n\n\n\n<p>\u30d6\u30e9\u30a6\u30b6\u4e0a\u3067\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u304b\u3089QR\u30b3\u30fc\u30c9\u3092\u8aad\u307f\u53d6\u308b\u7121\u6599\u30c4\u30fc\u30eb\u3067\u3059\u3002\u30a2\u30d7\u30ea\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3084\u30ab\u30e1\u30e9\u306f\u4e0d\u8981\u3067\u3001\u304a\u624b\u6301\u3061\u306e\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3059\u308b\u3060\u3051\u3067\u77ac\u6642\u306b\u4e2d\u8eab\u3092\u89e3\u6790\u3057\u307e\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>\u5f53\u30c4\u30fc\u30eb\u306f\u3001PC\u3084\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u306e\u30d6\u30e9\u30a6\u30b6\u4e0a\u3067\u5b8c\u7d50\u3059\u308b\u30b7\u30f3\u30d7\u30eb\u306aQR\u30b3\u30fc\u30c9\u89e3\u6790\u30c4\u30fc\u30eb\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u6a5f\u80fd\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u753b\u50cf\u304b\u3089\u306eQR\u30b3\u30fc\u30c9\u89e3\u6790<\/strong> \u30c9\u30e9\u30c3\u30b0\uff06\u30c9\u30ed\u30c3\u30d7\u3001\u307e\u305f\u306f\u30d5\u30a1\u30a4\u30eb\u9078\u629e\u3067\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3059\u308b\u3060\u3051\u3067\u3001\u753b\u50cf\u5185\u306eQR\u30b3\u30fc\u30c9\u3092\u81ea\u52d5\u3067\u8aad\u307f\u53d6\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30ef\u30f3\u30af\u30ea\u30c3\u30af\u30b3\u30d4\u30fc\u6a5f\u80fd<\/strong> \u8aad\u307f\u53d6\u3063\u305f\u30c6\u30ad\u30b9\u30c8\u30c7\u30fc\u30bf\u3092\u3001\u30dc\u30bf\u30f3\u3072\u3068\u3064\u3067\u30af\u30ea\u30c3\u30d7\u30dc\u30fc\u30c9\u306b\u30b3\u30d4\u30fc\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>URL\u306e\u76f4\u63a5\u30a2\u30af\u30bb\u30b9<\/strong> \u8aad\u307f\u53d6\u3063\u305f\u7d50\u679c\u304cWeb\u30b5\u30a4\u30c8\u306eURL\uff08http\u307e\u305f\u306fhttps\u304b\u3089\u59cb\u307e\u308b\u6587\u5b57\u5217\uff09\u3060\u3063\u305f\u5834\u5408\u3001\u300c\u30ea\u30f3\u30af\u5148\u3092\u958b\u304f\u300d\u30dc\u30bf\u30f3\u304c\u8868\u793a\u3055\u308c\u3001\u305d\u306e\u307e\u307e\u30a2\u30af\u30bb\u30b9\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>QR\u30b3\u30fc\u30c9\uff08\u4e8c\u6b21\u5143\u30b3\u30fc\u30c9\uff09\u306f\u3001\u6a2a\u65b9\u5411\u3060\u3051\u3067\u306a\u304f\u7e26\u65b9\u5411\u306b\u3082\u60c5\u5831\u3092\u6301\u3064\u305f\u3081\u3001\u5f93\u6765\u306e\u30d0\u30fc\u30b3\u30fc\u30c9\u3068\u6bd4\u3079\u3066\u5927\u5bb9\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3067\u304d\u308b\u6280\u8853\u3067\u3059\u3002QR\u30b3\u30fc\u30c9\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u4ee3\u8868\u7684\u306a\u60c5\u5831\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Web\u30b5\u30a4\u30c8\u306eURL<\/strong> 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