Authorization-jwt-verifier (RS256)

Browser-Native Implementation:

• Uses Web Crypto API
• Uses TextEncoder/TextDecoder for string/buffer conversion
• No external dependencies required

Full JWT Verification Features:

• Fetches JWKS from the given endpoint.
• Converts JWK to CryptoKey using Web Crypto API.
• Verifies RS256 signatures.
• Checks token expiration and timing claims.
• Provides detailed feedback on all verification steps.

Comprehensive Results

• Shows exactly why verification fails/succeeds.
• Displays decoded payload.
• Highlights timing issues (like expiration).
• Shows key matching status.

You can paste in fresh tokens to test with current keys from the given JWKS endpoint. This implementation works in any modern browser.