deftools.io Security

AES Encrypt / Decrypt

Encrypt and decrypt text with AES-256-GCM using a passphrase (PBKDF2 key derivation) or a raw key. Portable base64 output includes salt, IV, and ciphertext. 100% client-side via Web Crypto.

Derive a 256-bit AES key from your passphrase with PBKDF2 + SHA-256.
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The base64 envelope packs v1, salt, IV, and ciphertext into a single string you can paste back to decrypt.
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