API Key Format
Generate API keys in the Stripe / GitHub / OpenAI shape: a stable prefix (sk_live_, ghp_, …) plus a cryptographically random body. Configurable alphabet and length. Pairs with backup-codes and password-generator for adjacent secret-generation needs.
About API Key Format
API Key Format generates keys shaped like the ones from Stripe, GitHub, or OpenAI: a recognizable prefix such as sk_live_ or ghp_ followed by a cryptographically random body. You'd use it when building or testing an API and you want keys that look and behave like the real thing, with a configurable alphabet and length. The randomness comes from your browser's crypto API, so generated secrets are never transmitted.
- Category
- create
- Input
- Accepts: */*.
- Output
- Outputs: application/json.
- Cost
- Free, runs in your browser
- Memory
- low
Common uses
- Mint realistic-looking test keys (sk_test_…, ghp_…) for fixtures in your integration test suite
- Design a key scheme for your own API by choosing a brand prefix and a key length
- Generate placeholder credentials for documentation and demos that mimic familiar provider formats
- Produce a batch of unique tokens to seed a staging database
- Pick a custom alphabet to avoid ambiguous characters in keys users may type by hand
- Prototype a secret-rotation flow with keys that match the shape your validators expect
Frequently asked questions
Are these keys cryptographically secure?
Yes. The random body is drawn from the browser's secure random generator, not a predictable pseudo-random source.
Does this register a real key with Stripe, GitHub, or OpenAI?
No. It only produces a string in the same shape. The key has no account or service behind it; it is for your own systems and tests.
Can I set my own prefix and length?
Yes. You configure the prefix, the character alphabet, and the length of the random body.
Is anything sent to a server?
No. Generation happens entirely in your browser, so the keys never leave your device.
What format is the output?
JSON, so you can copy a single key or pull a batch into code programmatically.
Keywords
- api-key
- token
- secret
- random
- generate
- stripe
- github