Stripe API Key Regex for JavaScript

What this pattern does

This page provides a well-structured, multi-part regular expression for matching stripe api key, ported and verified for JavaScript. In security-sensitive code, using an unverified regex can open the door to both false positives and denial-of-service attacks. The snippet below is ready to drop into your JavaScript project — whether you're validating in an Express middleware, a Next.js API route, or a client-side form.

Javascript Implementation

// Stripe API Key
// ReDoS-safe | RegexVault — Security > API Keys & Tokens

const stripeApiKeyRegex = /^(sk|pk|rk)_(live|test)_[0-9a-zA-Z]{24,}$/;

function validateStripeApiKey(input: string): boolean {
  return stripeApiKeyRegex.test(input);
}

// Example
console.log(validateStripeApiKey("sk_live_4eC39HqLyjWDarjtT1zdp7dc")); // true

Test Cases

When to use this pattern

This pattern is drawn from the Security > API Keys & Tokens category and carries a ReDoS-safe certification. That matters for JavaScript developers because especially critical in long-running Node.js event loops where a ReDoS vulnerability can block the entire process. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

Prefixes: sk=secret key (server-side only), pk=publishable key (client-safe), rk=restricted key. Environments: live (production) vs test. Secret keys (sk_*) must never be exposed in client-side code or logs. Publishable keys (pk_*) are intentionally public.