Random IV Generator
Generate a random initialization vector (IV) for block encryption. All values are generated on your device using a cryptographically secure random generator — nothing is sent to a server.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
16 bytes
Example Output
Hex: a1b2c3…(IV)
How to Use
- 1Open "More settings" to adjust parameters (e.g. size/length) if needed.
- 2Click the Generate button.
- 3Copy the result with the Copy button.
About Random IV
An IV (Initialization Vector) is a random value that makes encrypting the same plaintext produce different ciphertext. Modes like AES-CBC and AES-CTR require one.
Golden rule: the IV must be UNIQUE per encryption under the same key (and for CBC, unpredictable). This tool generates a random IV (default 16 bytes = the AES block size) in hex.
An IV is not secret — it is usually sent alongside the ciphertext. For AEAD like GCM/ChaCha, the analogous value is called a nonce — see Random Nonce.
FAQ
Are my data or keys sent to a server?
No. Random IV runs entirely in your browser using the Web Crypto API and client-side libraries. Your data, passwords, and keys never leave your device.