How random are the results?

They come from your browser's cryptographically secure random number generator (crypto.getRandomValues) with rejection sampling to avoid bias. Math.random() is never used.

Are generated values stored anywhere?

No. They exist only on this page, are never sent to a server or written to storage, and are gone when you close or reload the tab.

How many bytes should I use?

32 bytes (256 bits) is a sound default for keys and secrets. 16 bytes is acceptable for identifiers that only need to be unguessable.

Token and API Key Generator - Free Online Tool

JavaScript is turned off. InspireTools processes files in your browser, so the tools need JavaScript to run.

Generate secure random tokens in hex or Base64 for API keys and secrets.