What AES-GCM does
AES-GCM protects data with a secret key. GCM authenticates ciphertext; CBC requires padding; CTR operates as a stream mode.
AES-GCM Text Encryption
Encrypt text with AES-GCM directly in your browser using a fast, privacy-focused local tool.
English
Encrypt → DecryptOFF
Encrypt
0 charactersUTF-8
Algorithm
Key
No key0 characters
0 characters0 decoded bytes · PBKDF2 input
Waiting for resultEncrypt-Decrypt
Ready
Encrypt step outputs
Run the operation to generate step outputs.
Decrypt
0 charactersAuto Detect
Algorithm
AES-256 - 256-bit key
Key
No key0 characters
0 characters0 decoded bytes · PBKDF2 input
Waiting for resultUTF-8
Ready
Decrypt step outputs
Run the operation to generate step outputs.
Keys, IVs, and authentication
Use a strong password or key and a fresh random IV for every encryption. Keep the complete Encrypt-Decrypt envelope when you need portable decryption metadata.
Common mistakes
Do not reuse an IV with the same key, lower the password-derivation cost without reason, or treat unauthenticated modes as tamper-proof.
Frequently asked questions
The Encrypt-Decrypt envelope keeps the salt, IV, authentication data, and algorithm settings needed to reproduce a compatible decryption.