html-tools/base64.html at main · levups/html-tools · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Base64 Encoder/Decoder</title>
    <link rel="stylesheet" href="common.css">
    <style>
        body {
            display: flex;
            flex-direction: column;
        }
    </style>
</head>
<body>

    <a href="index.html" class="back-link">
        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
            <path d="M19 12H5M12 19l-7-7 7-7"/>
        </svg>
        All Tools
    </a>

    <header>
        <h1>Base64 Encoder/Decoder</h1>
        <p class="subtitle">Real-time bidirectional conversion</p>
    </header>

    <div class="controls">
        <button id="clearBtn" class="secondary">Clear All</button>
    </div>

    <div class="container">
        <div class="pane">
            <div class="pane-header">
                <span class="label">
                    <svg class="icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                        <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"></path>
                        <polyline points="14 2 14 8 20 8"></polyline>
                    </svg>
                    Text
                </span>
                <button id="copyText" class="copy-btn">Copy</button>
            </div>
            <textarea id="textArea" placeholder="Type or paste text here..." spellcheck="false"></textarea>
        </div>

        <div class="pane">
            <div class="pane-header">
                <span class="label">
                    <svg class="icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                        <rect x="3" y="11" width="18" height="11" rx="2" ry="2"></rect>
                        <path d="M7 11V7a5 5 0 0 1 10 0v4"></path>
                    </svg>
                    Base64
                    <span id="statusIndicator" class="status-indicator"></span>
                </span>
                <button id="copyBase64" class="copy-btn">Copy</button>
            </div>
            <textarea id="base64Area" placeholder="Type or paste Base64 here..." spellcheck="false"></textarea>
            <div id="errorMessage" class="error-message"></div>
        </div>
    </div>

    <script>
        const textArea = document.getElementById('textArea');
        const base64Area = document.getElementById('base64Area');
        const clearBtn = document.getElementById('clearBtn');
        const copyText = document.getElementById('copyText');
        const copyBase64 = document.getElementById('copyBase64');
        const errorMessage = document.getElementById('errorMessage');
        const statusIndicator = document.getElementById('statusIndicator');

        let updating = false;

        function encodeToBase64() {
            if (updating) return;
            updating = true;

            errorMessage.style.display = 'none';
            statusIndicator.className = 'status-indicator';

            const text = textArea.value;
            if (!text) {
                base64Area.value = '';
                updating = false;
                return;
            }

            try {
                base64Area.value = btoa(unescape(encodeURIComponent(text)));
                statusIndicator.className = 'status-indicator valid';
            } catch (e) {
                statusIndicator.className = 'status-indicator invalid';
            }

            updating = false;
        }

        function decodeFromBase64() {
            if (updating) return;
            updating = true;

            errorMessage.style.display = 'none';
            statusIndicator.className = 'status-indicator';

            const base64 = base64Area.value;
            if (!base64) {
                textArea.value = '';
                updating = false;
                return;
            }

            try {
                textArea.value = decodeURIComponent(escape(atob(base64)));
                statusIndicator.className = 'status-indicator valid';
            } catch (e) {
                errorMessage.style.display = 'block';
                errorMessage.textContent = 'Invalid Base64 string';
                statusIndicator.className = 'status-indicator invalid';
            }

            updating = false;
        }

        textArea.addEventListener('input', encodeToBase64);
        base64Area.addEventListener('input', decodeFromBase64);

        clearBtn.addEventListener('click', () => {
            textArea.value = '';
            base64Area.value = '';
            errorMessage.style.display = 'none';
            statusIndicator.className = 'status-indicator';
            textArea.focus();
        });

        function setupCopyButton(btn, textarea) {
            btn.addEventListener('click', () => {
                if (!textarea.value) return;
                navigator.clipboard.writeText(textarea.value).then(() => {
                    const originalText = btn.textContent;
                    btn.textContent = 'Copied!';
                    btn.classList.add('copied');
                    setTimeout(() => {
                        btn.textContent = originalText;
                        btn.classList.remove('copied');
                    }, 2000);
                });
            });
        }

        setupCopyButton(copyText, textArea);
        setupCopyButton(copyBase64, base64Area);
    </script>
</body>
</html>