About

Security

JWT Secret Key Generator

Generate a strong random JWT secret key online for development and testing.

Features

  • Cryptographically strong browser randomness
  • Configurable output
  • Copy-ready secret

How to use it

  1. Choose the desired secret length.
  2. Generate a new secret.
  3. Copy it into a secure development environment.

Example and use cases

Create a separate local JWT secret for a development API instead of reusing a production value.

Useful for local authentication prototypes, test APIs, and development environment setup.

Security Tool

JWT Secret Key Generator

Generate a cryptographically secure random secret key for signing and verifying JWT tokens.

Generate Secret

Choose a recommended length or enter a custom size.

Quick Select

Recommended
bits

Allowed range: 32–4096 bits. Length must be a multiple of 8.

01

Choose length

Select 128, 256, 512 bits or choose a custom length.

02

Secure randomness

The browser crypto API generates cryptographically secure random bytes.

03

Get your secret

The random bytes are converted to a hexadecimal secret ready for use.

Example

256-bit JWT Secret

97e9c6a4f7b82d193e65c1a9f03b74d6b8215f6e4c9a7b2d8e13f5a6c0b9d2e7

64 hexadecimal characters = 32 bytes = 256 bits.

FAQ

Related Tools

JWT Decoder

Decode and inspect JWT tokens.

Base64 Encoder

Encode and decode Base64 data.

UUID Generator

Generate random UUID v4 identifiers.

Frequently asked questions

Should I use a generated secret in production?

Use a securely managed production secret stored in your deployment secret manager, and never commit it to source control.

Related developer tools

JWT DecoderUUID GeneratorBase64 Encoder