🔐 Encrypt & Decrypt Messages
Use this free tool to encrypt text into a secure message that only someone with your passphrase can read. Perfect for sharing secret messages via email or chat. Your message is secured using AES-256 encryption, right in your browser. It stays completely private — even we can’t see it.
Encrypt a Message
Decrypt a Message
Frequently Asked Questions
🔐 What is a secret message generator?
A secret message generator lets you encrypt text into a hidden, unreadable format using a passphrase. Only someone with the same passphrase can decrypt it. It’s perfect for fun, privacy, or secure communication.
🧾 How do I encrypt text online?
Just enter your message, type a passphrase, and click “Encrypt.” Your message will be encoded using AES encryption. You can share it safely by email, chat, or text.
🔓 How do I decrypt a message?
Paste the encrypted message and enter the same passphrase used during encryption. If the key is correct, you’ll instantly see the original text.
🔐 What is AES encryption?
AES (Advanced Encryption Standard) is a widely used symmetric encryption algorithm that protects data using a password or key. It’s trusted by governments and security professionals around the world.
🛡️ Is this tool secure?
Yes. All encryption and decryption happens in your browser using JavaScript. Your text and password never leave your device or get stored on our servers.
🧪 How does the encryption work technically?
This tool uses AES-256 encryption in CBC (Cipher Block Chaining) mode, provided by the trusted open-source CryptoJS library. When you enter a passphrase, the system creates a secure encryption key from it using a salted key derivation method — meaning the same passphrase creates a different output every time.
Each encrypted message includes the encrypted data, a randomly generated salt, and an initialization vector (IV). These are all encoded into the final message you see. When someone pastes the encrypted text and types in the same passphrase, the tool decrypts everything directly in your browser — without sending anything to a server.
This approach offers strong protection for private messages, puzzles, and secure sharing — while being fast and free to use.
🎯 Can I use this to send encrypted emails?
Absolutely. You can encrypt a message here, copy the encrypted text, and paste it into an email. The receiver just needs the same passphrase and can decrypt it here too.
🧠 Who uses this kind of tool?
People use it to:
- Send private messages
- Play games or puzzles
- Hide secret codes or jokes
- Encrypt data for personal notes
- Practice cyber security techniques