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API Key Generator — Generate Secure Random API Keys Free

Generator

Generate cryptographically random API keys and tokens in HEX, alphanumeric, Base64, UUID and JWT-like formats. Free secure API key generator — no data sent to servers.

✓ Free✓ No Sign-up✓ Browser-based

Format

Length: 32 chars

Prefix (optional)

Count: 5

About the API Key Generator — Generate Secure Random API Keys Free

Our free API key generator creates secure, random keys and tokens in multiple formats for software development, API authentication, secret tokens and environment variables. Choose from HEX, alphanumeric, Base64, UUID v4 and JWT-like formats. Set a custom length and prefix (e.g. sk_, pk_, api_). Generate up to 20 keys at once. All keys are generated client-side in your browser — nothing is transmitted to any server.

How to Use the API Key Generator — Generate Secure Random API Keys Free

1
Select your format — HEX, Alphanumeric, Base64, UUID or JWT-like.
2
Set the key length (for HEX, alphanumeric and Base64).
3
Optionally add a prefix such as sk_, pk_ or api_.
4
Set how many keys to generate (1–20).
5
Click Generate Keys and copy individually or all at once.

Frequently Asked Questions

What is an API key used for?

API keys authenticate requests to APIs and web services. They allow servers to verify that a request comes from an authorised source — used in web apps, mobile apps and server-to-server communication.

What format should I use?

HEX is widely used and URL-safe. UUID v4 is standard for unique identifiers. Alphanumeric keys are readable. JWT-like follows the three-part format used in JSON Web Tokens.