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AES Text Encryption & Decryption - Secure Cipher Tool Online

Encrypt and decrypt sensitive text messages using industry-standard AES (128/192/256-bit) cipher algorithms with custom passphrases.

This tool runs in your browser.
Processed locally in your browser.

How to use

  1. 01Enter or upload the source data.
  2. 02Run the tool in your browser.
  3. 03Review, copy, or download the result.

FAQ

What is AES encryption and how secure is it?

AES (Advanced Encryption Standard) is a symmetric block cipher trusted worldwide. Breaking a 256-bit AES key is mathematically impossible with modern computing.

Can text be recovered if the secret passphrase is lost?

No. AES features mathematical irreversibility without the proper decryption key or passphrase. Always store your passphrase securely.

Is my secret key or plaintext transmitted across the web?

Never. Cryptographic operations leverage the client-side Web Cryptography API inside your browser sandbox, keeping secrets completely local.