Dev
Fake Secure Token Generator
Pasting real API keys or secrets into test fixtures, README examples, or documentation is a common and costly mistake. Placeholder tokens that look authentic — right length, right character set, right prefix — let you write realistic test code without ever putting a real credential at risk. This tool generates between 1 and 12 random high-entropy strings in one of three formats. "hex" produces 64-character lowercase hex strings, matching the shape of many API secrets and HMAC keys. "base64url" produces 43-character URL-safe base64 strings (no padding), common for OAuth tokens and JWTs. "api-key" prepends sk_test_ to a 32-character alphanumeric string, mimicking the format used by Stripe and similar services. Choose a format and a count, then copy the output. The tokens are generated from Math.random() in the browser — sufficient randomness for test fixtures and documentation, but not a substitute for a cryptographically secure random generator (crypto.getRandomValues or equivalent) when producing real production secrets. Never commit real secrets to version control.
How to use
- Choose your options above
- Click Generate
- Copy your result
Detailed instructions
- Choose a token format.
- Pick how many tokens you want.
- Click Generate to produce tokens.
- Use real secrets only from a secure source.
Use Cases
- •Seeding test fixtures with tokens
- •Documenting API key formats
- •Filling example config safely
- •Testing token validation
- •Creating placeholder secrets
Tips
- →These are for testing, not production.
- →Never commit real secrets.
- →Generate real tokens securely.
- →Match the format to your system.
FAQ
what are the three output formats
"hex" produces a 64-character lowercase hexadecimal string. "base64url" produces a 43-character URL-safe base64 string without padding. "api-key" produces a string prefixed with sk_test_ followed by 32 random alphanumeric characters, matching the shape of Stripe-style test keys.
are these tokens cryptographically secure
They use Math.random(), which is not cryptographically secure. For test fixtures and documentation placeholders they are perfectly adequate. For real production secrets — API keys, signing secrets, session tokens — use a cryptographically secure source like crypto.getRandomValues() in the browser or crypto.randomBytes() in Node.
can i use these tokens in my application code
Only as test placeholders. These tokens are randomly generated and not registered with any service, so they will not authenticate anything. Use them wherever a realistic-looking token is needed in tests, docs, or example config — never as actual credentials.
which format should i pick for my use case
Pick the format that matches the system you are testing or documenting. Hex suits raw secrets, HMAC keys, and database tokens. Base64url suits OAuth access tokens and JWTs. The api-key format suits tests that exercise code expecting a sk_test_-prefixed value, like Stripe client libraries.
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