ASP.NET Machine Key Generator

Generate secure <machineKey> values for your web.config file. Each page load generates a fresh unique key pair.

Your Generated Machine Key

Copy the XML below and paste it into the <system.web> section of your web.config:

<machineKey
  validationKey="575EB3CDE91DE885DD090F10C492184F615B7AA029892AF68C3C3994ABAC3805"
  decryptionKey="8BC017DCB04BB9C6EBE4715C5D0C69E20ACA2719E19B1BB9"
  validation="SHA1"
  decryption="AES" />

Usage Notes

Use the same machineKey on all servers in a web farm to ensure consistent encryption.
For maximum security, use validation="HMACSHA256" instead of SHA1.
Never share your machineKey — it protects Forms Authentication tickets and ViewState.
Regenerate keys whenever a server is compromised.

Encrypting your web.config connection strings →