AES-256 Encryption
Encrypt and decrypt text with AES-256-GCM. Key derived from your passphrase via PBKDF2-SHA256.
What is AES-256 Encryption?
AES-256-GCM is the gold standard for symmetric encryption — used by TLS, signal, and most disk encryption. This tool uses the Web Crypto API in your browser: salt + IV randomization per encryption, 100,000 PBKDF2 iterations on your passphrase. Output is base64-encoded for safe transport.
Frequently asked questions
Where is my passphrase stored?▼
Nowhere. It's used to derive the key in-memory and is never sent or saved.
What if I lose the passphrase?▼
The data is unrecoverable. AES-256 cannot be brute-forced in any reasonable timeframe.
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