AES Encrypt / Decrypt

Encrypt and decrypt text locally with AES

Plaintext / ciphertext:

Key:

IV (optional):

Output

How to use AES

Defaults to AES-CBC + PKCS7. Output format is ivBase64:cipherBase64. This is a local demo tool with no key custody — not for production key management.

Keys and content are processed only in your browser
To decrypt, paste full iv:ciphertext, or fill IV separately
Not a password-storage solution

FAQ

What is the ciphertext format?

Encryption output is two Base64 parts: ivBase64:cipherBase64.

Is my data uploaded?

No. Encryption and decryption stay local.