🔒 Encrypt Map
🔓 Decrypt Map
Data Segment (Plaintext)
Cryptographic Key
Data processed!
Computed Ciphertext Result
ℹ️ AES-GCM 256-bit configuration. 100K PBKDF2 iterations. Evaluated purely inside browser runtime environment sandbox.

Text Encryption & Decryption: AES-256 GCM

Transmitting sensitive information—such as API keys, database credentials, or private personal messages—over unencrypted channels like email or chat apps is highly risky. Once a message leaves your device, it can be intercepted, read, or logged by third parties.

Our free online Text Encryption Tool secures your data by scrambling plaintext into an unreadable Base64 ciphertext string. Utilizing the industry-standard AES-256 GCM (Advanced Encryption Standard with Galois/Counter Mode), it ensures that only individuals who possess the correct cryptographic passphrase can decrypt and read the original message.

How the Cryptographic Engine Works

This tool does not rely on weak legacy algorithms like DES or simple Base64 encoding. It implements military-grade security protocols directly inside your browser:

  • PBKDF2 Key Derivation: Your human-readable passphrase is run through 100,000 iterations of the PBKDF2 algorithm using a randomized salt. This prevents hackers from using pre-computed "rainbow tables" to guess your key.
  • AES-GCM Encryption: The derived key is used to encrypt your text using a 256-bit block cipher. GCM mode is authenticated, meaning it encrypts the data and guarantees it hasn't been tampered with.
  • Randomized IVs: An Initialization Vector (IV) is randomly generated for every encryption. This means encrypting the exact same message twice will result in two completely different ciphertext strings, drastically increasing security.

Frequently Asked Questions (FAQs)

Is my plaintext sent to your server?
Absolutely not. This tool utilizes the native Web Crypto API built directly into modern web browsers. The entire encryption and decryption process happens locally in your device's memory. Your passwords and data are never transmitted over the internet.
What happens if I forget my passphrase?
Because this is a strict zero-knowledge implementation, the data is lost permanently. There are no backdoors, no "forgot password" links, and no way to recover the plaintext without the exact cryptographic key used during encryption.
Why is the output longer than the input?
The final Base64 string contains more than just the encrypted text. It physically houses the randomized Salt (16 bytes), the Initialization Vector (12 bytes), the Authentication Tag (for integrity), and the Ciphertext itself.

Secure Your Sensitive Data

Stop sending plaintext secrets. Scroll up, enter a strong passphrase, and encrypt your text before sending it.