image_editor/pdf_remove_password.html at main · bardal/image_editor · 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>Remove Password from PDF</title>
    <script src="https://cdn.jsdelivr.net/npm/pdf-lib@1.17.1/dist/pdf-lib.min.js"></script>

    <style>
        /* ===== LAYOUT ===== */
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            margin: 0;
            padding: 0;
            background: #f0f0f0;
            color: #333;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .container {
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            background: #fff;
            min-height: 100vh;
            box-shadow: 0 0 20px rgba(0,0,0,0.1);
        }

        /* ===== HEADER ===== */
        .header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 20px;
            margin: -20px -20px 30px -20px;
            text-align: center;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        .header h1 {
            margin: 0;
            font-size: 24px;
            font-weight: 600;
        }

        .header .subtitle {
            margin: 5px 0 0 0;
            font-size: 14px;
            opacity: 0.9;
        }

        /* ===== FORM SECTION ===== */
        .form-section {
            background: #f8f9fa;
            border: 1px solid #dee2e6;
            border-radius: 8px;
            padding: 20px;
            margin-bottom: 20px;
        }

        .form-group {
            margin-bottom: 15px;
        }

        .form-group:last-child {
            margin-bottom: 0;
        }

        label {
            display: block;
            margin-bottom: 5px;
            font-weight: 500;
            color: #495057;
        }

        input[type="file"], input[type="password"] {
            width: 100%;
            padding: 10px;
            border: 1px solid #dee2e6;
            border-radius: 4px;
            font-size: 14px;
            background: white;
            box-sizing: border-box;
        }

        input[type="file"]:focus, input[type="password"]:focus {
            border-color: #007bff;
            outline: none;
            box-shadow: 0 0 0 2px rgba(0,123,255,0.25);
        }

        /* ===== BUTTONS ===== */
        .btn {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
            display: inline-block;
            text-decoration: none;
        }

        .btn:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }

        .btn:disabled {
            background: #6c757d;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        /* ===== MESSAGES ===== */
        .message {
            padding: 12px;
            border-radius: 4px;
            margin: 15px 0;
            display: none;
        }

        .message.success {
            background: #d4edda;
            border: 1px solid #c3e6cb;
            color: #155724;
        }

        .message.error {
            background: #f8d7da;
            border: 1px solid #f5c6cb;
            color: #721c24;
        }

        .message.info {
            background: #d1ecf1;
            border: 1px solid #bee5eb;
            color: #0c5460;
        }

        /* ===== LOADING ===== */
        .loading {
            display: none;
            text-align: center;
            padding: 20px;
            color: #6c757d;
            font-style: italic;
        }

        .loading-spinner {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid #f3f3f3;
            border-top: 3px solid #667eea;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-right: 10px;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* ===== NOTE SECTION ===== */
        .note {
            background: #fff3cd;
            border: 1px solid #ffeaa7;
            color: #856404;
            padding: 15px;
            border-radius: 4px;
            margin-top: 20px;
            font-size: 13px;
            line-height: 1.5;
        }

        .note strong {
            color: #533f03;
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 768px) {
            .container {
                margin: 0;
                padding: 15px;
                box-shadow: none;
            }

            .header {
                margin: -15px -15px 20px -15px;
                padding: 15px;
            }

            .header h1 {
                font-size: 20px;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="header">
            <h1>🔓 Remove Password from PDF</h1>
            <div class="subtitle">Unlock password-protected PDFs in your browser</div>
        </div>

        <div class="form-section">
            <div class="form-group">
                <label for="pdfFile">Select Password-Protected PDF:</label>
                <input type="file" id="pdfFile" accept=".pdf" />
            </div>

            <div class="form-group">
                <label for="password">Enter PDF Password:</label>
                <input type="password" id="password" placeholder="Enter the PDF password" />
            </div>

            <div class="form-group">
                <button id="unlockBtn" class="btn" disabled>🔓 Unlock PDF</button>
            </div>
        </div>

        <div id="loading" class="loading">
            <div class="loading-spinner"></div>
            Processing PDF...
        </div>

        <div id="result" class="message success"></div>
        <div id="error" class="message error"></div>
        <div id="info" class="message info"></div>

        <div class="note">
            <strong>Important Notes:</strong><br>
            • This tool works only if the PDF is not encrypted with advanced security features<br>
            • You must know the correct password to unlock the PDF<br>
            • Client-side JavaScript libraries cannot remove passwords from all types of encrypted PDFs<br>
            • Files are processed entirely in your browser - nothing is uploaded to any server<br>
            • Some PDFs with owner passwords but no user passwords may not require a password input
        </div>
    </div>

    <script>
        // Check if pdf-lib loaded successfully, if not show error
        document.addEventListener('DOMContentLoaded', function() {
            if (typeof window.PDFLib === 'undefined') {
                document.getElementById('error').innerHTML = `
                    <strong>⚠️ PDF Library Not Loaded</strong><br>
                    The PDF processing library could not be loaded. This may be due to network restrictions or ad blockers.<br>
                    Please try refreshing the page or disabling ad blockers.
                `;
                document.getElementById('error').style.display = 'block';
                document.getElementById('unlockBtn').disabled = true;
                document.getElementById('unlockBtn').textContent = 'PDF Library Not Available';
            }
        });

        const PDFLib = window.PDFLib;

        // DOM elements
        const pdfFileInput = document.getElementById('pdfFile');
        const passwordInput = document.getElementById('password');
        const unlockBtn = document.getElementById('unlockBtn');
        const loading = document.getElementById('loading');
        const result = document.getElementById('result');
        const error = document.getElementById('error');
        const info = document.getElementById('info');

        // State
        let selectedFile = null;

        // Event listeners
        pdfFileInput.addEventListener('change', handleFileSelect);
        passwordInput.addEventListener('input', updateUnlockButton);
        passwordInput.addEventListener('keypress', handlePasswordKeyPress);
        unlockBtn.addEventListener('click', unlockPDF);

        function handleFileSelect(event) {
            selectedFile = event.target.files[0];
            updateUnlockButton();
            clearMessages();

            if (selectedFile) {
                if (selectedFile.type !== 'application/pdf') {
                    showError('Please select a valid PDF file.');
                    selectedFile = null;
                    updateUnlockButton();
                    return;
                }

                showInfo(`Selected: ${selectedFile.name} (${formatFileSize(selectedFile.size)})`);
            }
        }

        function handlePasswordKeyPress(event) {
            if (event.key === 'Enter' && !unlockBtn.disabled) {
                unlockPDF();
            }
        }

        function updateUnlockButton() {
            unlockBtn.disabled = !selectedFile || !passwordInput.value.trim();
        }

        async function unlockPDF() {
            if (!selectedFile || !passwordInput.value.trim()) {
                showError('Please select a PDF file and enter a password.');
                return;
            }

            if (typeof window.PDFLib === 'undefined') {
                showError('PDF processing library is not available. Please refresh the page and try again.');
                return;
            }

            clearMessages();
            showLoading(true);
            unlockBtn.disabled = true;

            try {
                // Read the PDF file
                const fileArrayBuffer = await selectedFile.arrayBuffer();

                // Try to load the PDF with the provided password
                let pdfDoc;
                try {
                    pdfDoc = await PDFLib.PDFDocument.load(fileArrayBuffer, {
                        password: passwordInput.value
                    });
                } catch (loadError) {
                    if (loadError.message.includes('password') || loadError.message.includes('encrypted')) {
                        throw new Error('Incorrect password or unsupported encryption method.');
                    }
                    throw loadError;
                }

                // Create a new PDF without password protection
                const unlockedPdfBytes = await pdfDoc.save();

                // Create download link
                const blob = new Blob([unlockedPdfBytes], { type: 'application/pdf' });
                const url = URL.createObjectURL(blob);

                const originalName = selectedFile.name.replace('.pdf', '');
                const downloadName = `${originalName}_unlocked.pdf`;

                result.innerHTML = `
                    <strong>✅ PDF Successfully Unlocked!</strong><br>
                    <a href="${url}" download="${downloadName}" class="btn" style="margin-top: 10px; display: inline-block;">
                        📥 Download Unlocked PDF
                    </a>
                `;
                result.style.display = 'block';

                // Clear form
                pdfFileInput.value = '';
                passwordInput.value = '';
                selectedFile = null;
                updateUnlockButton();

            } catch (err) {
                console.error('PDF unlock error:', err);

                let errorMessage = 'Failed to unlock PDF. ';

                if (err.message.includes('password') || err.message.includes('Incorrect password')) {
                    errorMessage += 'Please check that the password is correct.';
                } else if (err.message.includes('encrypted') || err.message.includes('encryption')) {
                    errorMessage += 'This PDF uses an encryption method that cannot be processed by this tool.';
                } else if (err.message.includes('Invalid PDF')) {
                    errorMessage += 'The selected file appears to be corrupted or is not a valid PDF.';
                } else {
                    errorMessage += 'This may be due to unsupported encryption or a corrupted file.';
                }

                showError(errorMessage);
            } finally {
                showLoading(false);
                updateUnlockButton();
            }
        }

        function showLoading(show) {
            loading.style.display = show ? 'block' : 'none';
        }

        function showError(message) {
            error.textContent = message;
            error.style.display = 'block';
        }

        function showInfo(message) {
            info.textContent = message;
            info.style.display = 'block';
        }

        function clearMessages() {
            result.style.display = 'none';
            error.style.display = 'none';
            info.style.display = 'none';
        }

        function formatFileSize(bytes) {
            if (bytes === 0) return '0 Bytes';
            const k = 1024;
            const sizes = ['Bytes', 'KB', 'MB', 'GB'];
            const i = Math.floor(Math.log(bytes) / Math.log(k));
            return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
        }
    </script>
</body>
</html>