Free AES Encrypt & Decrypt Online

Cryptography

What is Free AES Encrypt & Decrypt Online?

AES Encrypt & Decrypt is a browser-based tool for symmetric encryption and decryption of text using the Advanced Encryption Standard (AES) with GCM (Galois/Counter Mode) and a 256-bit key. AES-256-GCM is a highly secure, government-grade cipher that provides both confidentiality and integrity for your data. The tool uses a passphrase to derive the encryption key securely.

How it works

The tool uses your provided passphrase to derive a strong encryption key through PBKDF2 (Password-Based Key Derivation Function 2) with 100,000 iterations. This key is then used with the AES-256-GCM algorithm to encrypt or decrypt your text. AES-GCM provides authenticated encryption, meaning it ensures both the privacy of the data and its integrity (that it hasn't been tampered with). All cryptographic operations happen locally in your browser using the Web Crypto API, guaranteeing that your sensitive data never leaves your device.

Features & Benefits

AES-256-GCM encryption - the same standard used by the NSA
Runs entirely in your browser - nothing leaves your device
Uses PBKDF2 with 100k iterations for secure key derivation

When to use

Securely encrypting sensitive text messages before sharing them through insecure channels.
Protecting small pieces of confidential information (e.g., notes, credentials) within your browser.
Learning about modern symmetric encryption techniques and their practical application.
Quickly encrypting or decrypting text for development or testing purposes where data privacy is critical.

Common Use Cases

Secure Messaging

Encrypt private messages before sending them via email or chat, and decrypt received messages securely.

Sensitive Data Storage

Encrypt snippets of confidential information to store locally or transmit, ensuring only those with the passphrase can access it.

Cryptographic Experimentation

Experiment with a strong encryption standard like AES-256-GCM to understand its process and benefits for data security.

Frequently Asked Questions

Is this secure?

Yes. AES-GCM-256 is a government-grade cipher. Security depends on your passphrase strength.

How do I share encrypted text?

Send the ciphertext to your recipient, then share the passphrase through a different channel.

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