JWK Inspector

Tool to inspect JSON Web Keys (JWKs), validate structure, and extract key parameters for developers, security engineers, and API integrations.

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100%

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About This Tool

JWK Inspector analyzes JSON Web Keys (JWKs) and JWKS to ensure structural correctness and readiness for token verification workflows. It validates fields like kty, kid, and algorithm compatibility and reports missing or malformed components.
Conceptually, the tool parses base64url-encoded values, inspects key material such as n and e for RSA, or crv, x, and y for EC, and records derived attributes like key size and supported algorithms. It aims to be RFC-aligned with RFC 7517, 7518, and 7519 references.
Audience and value: developers, security engineers, identity teams, and DevOps engineers who manage JWT verification, key rotation, or JWKS provisioning. Unique differentiators include strict RFC-compliant parsing, transparent field-level outputs, and automation-friendly JSON reports suitable for CI pipelines.
Core features and use cases include: validation of JWK structure; extraction of kty, kid, alg, n, e, crv, x, y; computation of key length; validation against intended usage; and ready-to-consume outputs for downstream tooling. The tool supports RSA, EC, and OKP keys and is designed for integration into build processes and security reviews.

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How to Use

Provide inputs: paste a JWK or JWKS JSON string into the input, or pass via API.
Select context: choose whether you intend to validate for JWT verification, key rotation, or metadata extraction.
Run analysis: the tool parses keys, validates fields, and computes derived attributes.
Review outputs: inspect key type, size, kid, alg compatibility, and any reported errors.
Use results: export a structured JSON report for integration or document findings in security reviews.

Frequently Asked Questions

Find Quick Answers

What formats are supported?

The tool accepts a single JWK object or a JWKS array. It validates each key independently and reports per-key results. It does not require tokens.

Which key types are supported?

RSA, EC, and OKP keys are supported. For RSA, the modulus n and exponent e are parsed; for EC, the curve, x, and y are parsed; for OKP, the crv and x are parsed.

Can results be used in automation?

Yes, the tool outputs a structured JSON report suitable for CI pipelines, configuration management, or integration into token verification workflows.

Does it verify signatures or trust?

No, it validates structure and parameter correctness only; signature verification requires a separate process with the appropriate public key and token.

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