Send sensitive details without exposing the content
Encrypt text, copy the resulting package into an email or chat, then send the passphrase through a separate channel — for example, a phone call or a different messaging app.
Free privacy tool
Encrypt text and files locally
Protect a note or a file up to 10 MB with a passphrase you control. Everything happens in your browser — there is no upload, account, or recovery key.
No upload, no account, no recovery key — encryption never leaves this tab.
AES-256-GCMPBKDF2 passphraseZero server copy
What this tool is for
Turn private text or a small file into an unreadable package before it is stored or sent through a service you do not fully control. The recipient can recover it only with the same passphrase.
Keep a private note in ordinary storage
Encrypt a note or file before placing the package in a notes app, email draft, or cloud folder. Keep the passphrase in your password manager, not beside the package.
Important: remember your passphrase. It is not an account passkey, and no one — including Simple Money Tracker — can reset it or recover the encrypted package.
Private, local encryption
Text, files, and your passphrase are processed only in this browser. Nothing is uploaded, saved to an account, or recoverable by Simple Money Tracker.
Encrypt or decrypt
Use a passphrase you control. Forgetting it means the encrypted package cannot be recovered.
0 B / 10 MB
Uses SMT’s zero-knowledge core: PBKDF2-SHA-256 (600,000 iterations) derives a KEK, which wraps a random AES-256-GCM DEK. The DEK encrypts your text or file.
No server copy
The page has no API call for your text, file, or passphrase.
Protected file metadata
File name, MIME type, and content are inside the AES-GCM encrypted payload.
Your passphrase is the key
Keep it separately. SMT cannot reset or recover a public package without it.
