AES Encrypt/Decrypt

About this AES tool

1. AES (Advanced Encryption Standard) is a widely used symmetric cipher.
2. Supports 128/192/256-bit keys; longer keys provide stronger security.
3. Considered highly secure with no practical attacks when used properly.
4. Efficient across platforms, suitable even for constrained environments.

How to Use

What this tool does

Encrypt and decrypt text using AES with a browser‑generated secret key. All operations run locally.

Steps

Click Generate Key to create a random key.
Enter plaintext and click Encrypt to produce ciphertext.
Paste ciphertext and click Decrypt to restore the original text.

Examples

Key: 16 random bytes → Encrypt: "hello" → Ciphertext (Base64).
Paste ciphertext → Decrypt with the same key → "hello".

Notes

You must keep the same key to decrypt successfully.
Large inputs are supported but may be slower on low‑end devices.
All processing is local; no data leaves your browser.