One Time Pad

One Time Pad lets you encrypt and decrypt messages using true one-time pad encryption — the only mathematically proven unbreakable cipher. You and your contact agree on a shared secret key Type your message and key to encrypt Share the encrypted message via text, email, DM, or post it publicly on OneTimePad.app Your contact decrypts using the same key Features Encrypt and decrypt messages instantly Supports A-Z, 0-9, and spaces Post encrypted messages publicly on OneTimePad.app Tap a link from OneTimePad.app to auto-fill and decrypt Share encrypted messages to any app No account required — no sign-up, no email No data collection — your keys and messages never leave your device Minimal permissions — no internet access required for encryption Why One Time Pad? Unlike modern encryption that relies on mathematical difficulty, OTP encryption is information-theoretically secure. A ciphertext can decode to any possible message of the same length, making brute force meaningless. As long as your key is random, at least as long as your message, and never reused — the encryption is unbreakable. Web Integration Visit https://OneTimePad.app to encrypt and decrypt in your browser, view public messages, and share links that open directly in the app. Only requests vibrate permission. What's New (Release Notes) Redesigned OneTimePad.app with new dark theme Deep links now auto-fill the decrypt field Bug fixes and performance improvements