Simple Text Encryption & Decryption Tool

Protect your private notes, messages, and other text from prying eyes with our simple and fast encryption tool. Using a symmetric-key cipher, this utility allows you to encrypt any text with a secret key. The original text can only be recovered by providing the exact same key for decryption, ensuring your information remains confidential.

How It Works

Our tool provides a seamless, real-time encryption and decryption workflow. The interface is designed to be intuitive and efficient.

  1. Choose Your Mode: Select either "Encrypt" to protect text or "Decrypt" to reveal it.
  2. Enter Text & Key: Provide the text you want to process and a secret key that you will remember.
  3. Get Instant Results: The processed text appears instantly in the other panel as you type.

Key Features

  • Symmetric-Key Encryption: The core of the tool. The same secret key is used to both encrypt and decrypt the text, making it simple and predictable.
  • Real-Time Processing: The encryption and decryption happen automatically as you type, with a smart delay to ensure a smooth experience without constant updates.
  • Seamless Mode Switching: When you switch between "Encrypt" and "Decrypt" modes, the input and output text boxes automatically swap their content, allowing you to instantly decrypt what you just encrypted (or vice versa) to verify your key.
  • Proprietary Cipher with Verification:
    • Uses a Vigenère-like cipher across a broad set of 95 printable characters.
    • The final encrypted output is Base64 encoded for safe transport and prefixed with a unique `TENC::` signature.
    • The tool will refuse to decrypt any text that doesn't start with this signature, preventing errors from trying to decrypt plain text or data from other sources.
  • Secure Key Input: The secret key field is a password-type input by default, and a convenient toggle button lets you show or hide the key as needed.
  • Clear Error Handling: If you use the wrong key or provide corrupted/invalid text for decryption, the tool provides a clear error message in the output box.
  • Convenient Utilities: Includes one-click buttons to "Copy" the output text to your clipboard or "Clear" all fields to start over.

How to Use the Tool

  1. To Encrypt:
    Select "Encrypt" mode. Type your sensitive information into the "Plain Text" box on the left. Enter a strong, memorable key in the "Secret Key" field. The "Encrypted Text" will appear on the right. Copy this full text (including the `TENC::` prefix) to save or share.
  2. To Decrypt:
    Select "Decrypt" mode. Paste the complete encrypted text (including `TENC::`) into the "Encrypted Text" box on the left. Enter the exact same secret key you used to encrypt it. Your original "Plain Text" will be revealed on the right.

Find Our Tool

Text Encryption, Encrypt Text Online, Decrypt Text, Secret Key Encryption, Password Protect Text, Vigenère Cipher, Simple Encryption Tool, Text Encoder, Secure Message, Symmetric Key Encryption.