AES Encryption / Decryption

Overview

• Derives an encryption key from your passphrase using PBKDF2 (100,000 iterations), and encrypts or decrypts text with AES-256-GCM.
• A random salt and IV (initialization vector) are generated on every encryption, so the same plain text and passphrase produce a different ciphertext each time.
• The ciphertext bundles the salt, IV, and encrypted data together, and is output and input as a single Base64 string.

Usage

1. Select "Encrypt" or "Decrypt" as the mode.
2. Enter the text (plain text for encryption, or Base64-encoded ciphertext for decryption) and a passphrase.
3. Click the "Encrypt" or "Decrypt" button to see the result.

Example

Plain text: Hello, World! / Passphrase: correct horse battery staple

A Base64-encoded ciphertext (different every time)

Use Cases

• Encrypting text lightly before sharing it with someone else
• Checking whether an AES encryption/decryption implementation in your application works correctly with standard parameters
• Learning about and verifying how AES-GCM encryption and decryption work

FAQ

Notes

• We do not recommend using the ciphertext or passphrase generated by this tool for long-term storage of real sensitive information.
• When decrypting, enter the Base64 string exactly as it was output during encryption, without adding line breaks or spaces.