Generate API key

Generate a random bearer token in a URL-safe or compact encoding.

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ToolAPI Key Generator
Input
Output
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Preview

How it works

Bytes from a cryptographically secure random source are encoded with the selected alphabet, such as hexadecimal or Base64url. The output is an opaque bearer secret; length and alphabet determine its brute-force search space.

  • URL-safe alphabets avoid escaping in headers and token storage.

Worked example

Stripe-style API Key
Generate a Base62 API key with a prefix like Stripe
Input
											Prefix: sk_test_
Length: 32
Format: base62
Count: 1
Output
												sk_test_aR9GarGc4gbOgueUMvHvXXx28g7qvzot

When to use this

Integration credentials, CI deployment secrets, and token rotation workflows generate bearer keys.

Edge cases

  • A token generated with a predictable timestamp is guessable.
  • Base64url and standard Base64 use different alphabets and padding.
  • Putting a bearer key in a URL can leak it through logs and referrers.

References