XOR Encryption

Encrypt and decrypt data using XOR cipher with customizable key.

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Encrypted results will appear here

About XOR Encryption

This tool uses position-based XOR encryption. Each byte is XORed with both the key and its position index, providing better obfuscation than simple XOR.

encrypted[i] = data[i] ^ key ^ (i & 0xFF)

Decoder Examples

Use these functions to decode data encrypted with this tool. Example key: 0x33

C++ 
#include <string>

std::string xorDecode(const unsigned char* data, size_t length) {
    std::string result;
    result.reserve(length);
    
    const unsigned char key = 0x33;
    for (size_t i = 0; i < length; ++i) {
        result += (char)(data[i] ^ key ^ (i & 0xFF));
    }
    
    return result;
}

// Usage:
// unsigned char encrypted[] = {0x96, 0x94, 0x92, ...};
// std::string decoded = xorDecode(encrypted, sizeof(encrypted));
Java 
public static String xorDecode(byte[] data) {
    StringBuilder result = new StringBuilder();
    
    final int key = 0x33;
    for (int i = 0; i < data.length; i++) {
        result.append((char)((data[i] & 0xFF) ^ key ^ (i & 0xFF)));
    }
    
    return result.toString();
}

// Usage:
// byte[] encrypted = {(byte)0x96, (byte)0x94, (byte)0x92, ...};
// String decoded = xorDecode(encrypted);
PHP 
function xorDecode(array $data): string {
    $result = '';
    
    $key = 0x33;
    for ($i = 0; $i < count($data); $i++) {
        $result .= chr($data[$i] ^ $key ^ ($i & 0xFF));
    }
    
    return $result;
}

// Usage:
// $encrypted = [0x96, 0x94, 0x92, ...];
// $decoded = xorDecode($encrypted);
JavaScript 
function xorDecode(data) {
    const key = 0x33;
    const decoded = new Uint8Array(data.length);
    
    for (let i = 0; i < data.length; i++) {
        decoded[i] = data[i] ^ key ^ (i & 0xFF);
    }
    
    return new TextDecoder().decode(decoded);
}

// Usage:
// const encrypted = [0x96, 0x94, 0x92, ...];
// const decoded = xorDecode(encrypted);

Common Uses

  • Simple data obfuscation
  • Configuration file protection
  • Binary data manipulation
  • String hiding in compiled code