Secret Key Generator

About the Secret Key Generator

Generate cryptographically secure secret keys as hex or base64 in any length. Ideal for JWT secrets and signing credentials.

Everything runs in your browser — nothing is uploaded.

How to use the Secret Key Generator

Step 1Choose how many results you need.
Step 2Press Generate.
Step 3Copy one result or download the whole batch.

When people reach for this tool

Create a throwaway signing secret

Local testing needs a real key with no operational value attached.

Start with a properly random secret rather than a typed one

A generated key is stronger than anything a person will invent.

Produce a replacement in the format the system expects

Matching the expected length and alphabet avoids a rejected configuration.

Practical tips

Never commit a generated key to a repository. A key in version control is a public key.
Set the byte length to whatever the system documents — some libraries accept only particular sizes.

What you get

Curated word and data banks
Copy or download results
Fully offline and private

Secret Key Generator — FAQ

How strong are these keys?

Generated from crypto.getRandomValues. A 32-byte hex key offers 256 bits of entropy.

What is a secret key used for?

Signing and verifying, so a receiver can prove a payload came from you and was not altered. It must be shared only with whoever needs to verify.

How long should a key be?

As long as the system supports. Longer keys are not meaningfully slower, so there is rarely a reason to choose a short one outside compatibility constraints.