Est. in the browser · runs entirely on your device
An all-in-one cryptography toolkit — classical ciphers, encoding, hashing, and modern authenticated encryption. Nothing you type here leaves this page.
Caesar, Vigenère, Atbash, and ROT13 — the pen-and-paper ciphers cryptography grew up on. Educational only; none of these resist a determined reader.
Base64, hexadecimal, and URL encoding. These are reversible transformations, not encryption — anyone can decode them.
One-way fingerprints of your input. Same input always gives the same hash; there's no "decrypt" button because hashing isn't reversible.
Real encryption: AES-256-GCM with a key derived from your passphrase via PBKDF2 (200,000 rounds). The sealed output bundles the salt and nonce it needs, so anyone with the passphrase can open it here.
Lose the passphrase and the message is gone for good — there is no recovery.