AWS Access Key ID Regex for JavaScript

What this pattern does

This page provides a well-structured, multi-part regular expression for matching aws access key id, 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

// AWS Access Key ID
// ReDoS-safe | RegexVault — Security > API Keys & Tokens

const awsAccessKeyIdRegex = /^(AKIA|ASIA|AROA|AIDA|ANPA|ANVA|APKA)[A-Z0-9]{16,20}$/;

function validateAwsAccessKeyId(input: string): boolean {
  return awsAccessKeyIdRegex.test(input);
}

// Example
console.log(validateAwsAccessKeyId("AKIAIOSFODNN7EXAMPLE")); // 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

AWS key type prefixes: AKIA=long-term IAM user key, ASIA=temporary STS session key (expires), AROA=role, AIDA=IAM user, ANPA=managed policy, ANVA=version, APKA=public key. Always pair with Secret Access Key for signing — access key ID alone is not sufficient to authenticate.