Python/index.html at main · jatinchahal2010/Python · 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>🔐 Secure Text Encryptor & Decryptor</title>
    <style>
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
            color: #fff;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            margin: 0;
        }

        .container {
            background-color: #1a1a1a;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.6);
            max-width: 600px;
            width: 100%;
            text-align: center;
        }

        h1 {
            background: linear-gradient(90deg, #00bfff, #4b6cb7);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-size: 2em;
            margin-bottom: 20px;
        }

        input, textarea {
            width: 100%;
            padding: 12px;
            margin: 10px 0;
            background-color: #2e2e2e;
            color: #fff;
            border: none;
            border-radius: 8px;
        }

        button {
            padding: 12px 20px;
            margin: 10px 5px;
            border: none;
            border-radius: 8px;
            background: linear-gradient(90deg, #00bfff, #4b6cb7);
            color: white;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s ease;
        }

        button:hover {
            background: linear-gradient(90deg, #4b6cb7, #00bfff);
        }

        pre {
            background-color: #2e2e2e;
            padding: 15px;
            border-radius: 8px;
            overflow-x: auto;
        }
    </style>
</head>
<body>

<div class="container">
    <h1>🔐 Secure Text Encryptor & Decryptor</h1>

    <input type="text" id="key" placeholder="Enter your secret key">
    <textarea id="inputText" rows="4" placeholder="Type your message here..."></textarea>

    <div>
        <button onclick="encryptText()">Encrypt 🔒</button>
        <button onclick="decryptText()">Decrypt 🔓</button>
    </div>

    <h3>🔎 Output:</h3>
    <pre id="output"></pre>
</div>

<script>
function encrypt(text, key) {
    let result = '';
    let keyLength = key.length;

    for (let i = 0; i < text.length; i++) {
        let char = text[i];
        if (/[a-zA-Z]/.test(char)) {
            let shift = key[i % keyLength].toLowerCase().charCodeAt(0) - 'a'.charCodeAt(0);
            if (char >= 'A' && char <= 'Z') {
                result += String.fromCharCode((char.charCodeAt(0) - 'A'.charCodeAt(0) + shift) % 26 + 'A'.charCodeAt(0));
            } else {
                result += String.fromCharCode((char.charCodeAt(0) - 'a'.charCodeAt(0) + shift) % 26 + 'a'.charCodeAt(0));
            }
        } else {
            result += char;
        }
    }
    return result;
}

function decrypt(text, key) {
    let result = '';
    let keyLength = key.length;

    for (let i = 0; i < text.length; i++) {
        let char = text[i];
        if (/[a-zA-Z]/.test(char)) {
            let shift = key[i % keyLength].toLowerCase().charCodeAt(0) - 'a'.charCodeAt(0);
            if (char >= 'A' && char <= 'Z') {
                result += String.fromCharCode((char.charCodeAt(0) - 'A'.charCodeAt(0) - shift + 26) % 26 + 'A'.charCodeAt(0));
            } else {
                result += String.fromCharCode((char.charCodeAt(0) - 'a'.charCodeAt(0) - shift + 26) % 26 + 'a'.charCodeAt(0));
            }
        } else {
            result += char;
        }
    }
    return result;
}

function encryptText() {
    const key = document.getElementById("key").value;
    const text = document.getElementById("inputText").value;
    document.getElementById("output").innerText = encrypt(text, key);
}

function decryptText() {
    const key = document.getElementById("key").value;
    const text = document.getElementById("inputText").value;
    document.getElementById("output").innerText = decrypt(text, key);
}
</script>

</body>
</html>