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Random bytes

Random Key Generator

Create random key material in common text encodings. Always follow the consuming application’s required size and format.

Generate random key material

Choose the byte length and representation required by your application.

Generated locallyThe raw bytes and encoded output remain in this browser tab.

Encoding does not change the randomness

Hexadecimal, Base64, and Base64url are different textual representations of the same random bytes. Select the encoding the destination explicitly accepts.

Handle generated keys as secrets

Copy the value directly into its secure destination. Do not place it in source control, URLs, analytics, screenshots, chat, or ordinary notes.

SSH keys are asymmetric key pairs

This tool does not create SSH keys. Use the native SSH key generation guide to create an Ed25519 public/private pair locally with ssh-keygen.

Protocol-specific output

For an IKE or VPN gateway, use the IPsec pre-shared key generator to get strongSwan formatting and IPsec-specific guidance. When ZIP or 7z software asks for a human-entered archive password rather than encoded key bytes, use the ZIP password generator. For Minecraft remote administration, the Minecraft RCON password generator creates a ready-to-paste server.properties block. To protect an Apache or nginx location with HTTP Basic Authentication, use the .htpasswd generator for a bcrypt username:hash entry.