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{}JSONKits

JWT Validator

Validate JSON Web Tokens (JWT) by verifying signature, expiration (exp), and other standard claims.

Input

text
loading editor…

Paste your input here to validate...
or drop a file anywhere in this pane

Output

json

Validation result will appear here...
press ⌘↵ to validate

Why Validate JWT Tokens?

JWT validation ensures that tokens are authentic, not expired, and contain valid claims. This is critical for security in any application that relies on JWT-based authentication.

JWT validation checks:

  • Signature: Verifies the token hasn't been tampered with.
  • Expiration (exp): Ensures the token is still valid.
  • Claims: Validates issuer, audience, and other standard claims.

How to Use

  1. Paste your JSON: Copy a sample JSON response from your API or editor.
  2. Click Validate: Press the button to process your input.
  3. Review Output: Your result appears instantly in the output panel.
  4. Copy to Project: Use the Copy button to grab the result and paste it into your project.

Frequently Asked Questions

How are nested objects handled?

Nested objects generate their own named type definition, referenced from the parent type. This keeps your code organized and reusable.

How are arrays typed?

Arrays infer their element type from the first item. Arrays of objects generate a collection type of the corresponding object type.

Is this tool safe to use?

Absolutely. This tool operates 100% client-side. Your JSON data never leaves your browser and is processed locally. We do not store, track, or upload your data.

Related Tools

  • JWT Decoder — Decode JSON Web Tokens (JWT) to inspect header, payload, and signature information. Decode JWTs without verification.
  • JSON Hash Generator — Generate cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512) of your JSON data for integrity verification and fingerprinting.