🔐 AES Encrypt/Decrypt
📖 What is AES Encryption?
AES (Advanced Encryption Standard) is the most widely used symmetric encryption algorithm. This tool uses AES-256-GCM mode, which provides authenticated encryption and complete protection for your data.
Features: Encrypt and decrypt with a password, fast speed, high security, and wide adoption worldwide.
- AES-256 — 256-bit key, provides high security
- GCM Mode — counter mode with built-in authentication
- Random IV — each encryption generates a random IV, so the same text produces different results
- Base64 Output — encrypted result is Base64-encoded for easy copy and storage
❓ FAQ
Is AES Encryption Safe?
AES-256 is one of the most secure encryption algorithms, used by the NSA to protect top-level classified data. As long as your password is strong, there is no known practical attack method.
What if I forget my password?
AES is symmetric encryption — if the password is lost, the encrypted data cannot be recovered. Please remember your password or save it with a password manager. This tool does not store any passwords or encrypted data.
Does my data go through a server?
No. All encryption and decryption is done locally in your browser using the Web Crypto API. Your data is never uploaded to any server.
Why does the same text produce different results each time?
Each encryption generates a random initialization vector (IV), so the same plaintext and password still produce different ciphertext. This is a standard security feature of GCM mode — the IV is extracted automatically during decryption.
What information does the encrypted result contain?
The encrypted output contains the IV, the authentication tag, and the ciphertext, all encoded into a single Base64 string. To decrypt, you only need this string and the password.
How secure is the AES encryption algorithm?
AES (Advanced Encryption Standard), defined by NIST FIPS 197, is the most widely used symmetric encryption algorithm globally. AES-256 provides 256-bit key strength, used by the US government for top-secret data protection and widely adopted by banks, financial institutions, and tech companies.