AES-GCM Encrypt & Decrypt
Browser-side AES-GCM with a pasted hex key, 12-byte IV, optional authenticated AAD, and Base64 or hex ciphertext — including the 128-bit tag. Text and file modes; nothing is uploaded.
Frequently asked questions
No. Key material and plaintext never upload. Nothing is sent to LocalTools servers for processing.
Never reuse a GCM IV/nonce with the same key; generate fresh random IVs per message.