XOR Cipher Encrypt Decrypt Online
XOR cipher tool for encryption and decryption. Perfect for learning cryptography concepts and simple obfuscation. Not suitable for secure encryption of sensitive data.
Mode:
Key format: UTF8 | Output: Hexadecimal
bytes
Characters: 0 | Bytes: 0
Result:
Encrypted result will appear here...Larger files are processed in chunks to keep the UI responsive.
Auto-process text changes
Automatically processes text when you type (text mode only).
Technical Information & Security Notes
Algorithm Details
- • Algorithm: XOR (Exclusive OR) with repeating key
- • Key formats: UTF-8 text or hexadecimal bytes
- • Output formats: Hexadecimal, Base64, or UTF-8 text
- • File processing: Chunked processing for large files
- • Key cycling: Key repeats when shorter than data
Security & Usage Warnings
- • ⚠️ NOT cryptographically secure for confidential data
- • Educational use only: Learn XOR cipher concepts
- • Simple obfuscation: Hide data from casual viewing
- • For real security: Use AES, ChaCha20, or similar
- • Key reuse: Never reuse keys with different data
Important Security Notice
XOR cipher is vulnerable to frequency analysis, known-plaintext attacks, and key reuse attacks. It provides NO security against determined attackers. Use modern cryptographic libraries for protecting sensitive information.