Talk to any AI safely.

Get a key at console.anthropic.com.

First time? Walk me through getting a key →

Strength: —. Auto-generated with your browser's secure random (EFF diceware, ~90 bits) — or type your own 2-5 words; weak ones are flagged, never blocked. Both sides must hold the same passphrase to rehydrate a shared document. Share it out of band (in person, a phone call, Signal) — never in the same email as the document, or the encryption is pointless.

Your API key and shared passphrase are stored in this browser only — never on our server. Persistent uses localStorage (cleartext, like browser autofill). This tab uses sessionStorage (cleared when you close this tab). Never keeps them in memory only (gone on reload). Forget now

Same each time is convenient — recipients only need to remember your one passphrase. Fresh per document is more secure — if a passphrase ever leaks, only that one document is exposed. The new passphrase appears once in the send dialog; you must copy and send it to the recipient out-of-band before closing the dialog (there is no recovery).

The key is stored only in this browser and is sent straight to the AI provider you chose — never to us.

Up to ~25 MB per file. Audio, video and image text need an OpenAI key in Settings.