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JWT Secret Key Generator

Generate secure JWT secret keys for HS256, HS384, HS512.

,
256 bits
Strong (HS256)
256

Recommendations

  • HS256 needs at least 256 bits. HS384 needs 384. HS512 needs 512.
  • Store the secret as an environment variable, never commit it to git.
  • Rotate keys periodically and on every suspected leak.
  • This page runs 100% in your browser. The key is never sent over the network.