JWT Decoder

Decode JWT header and payload for claim inspection and debugging.

Quick Links

Quick Example

Input: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjMifQ.signature

Output: Decoded header/payload JSON

Common mistakes

String Ninja tools run in the browser for practical text, security, and data workflows. For critical production decisions, validate outcomes in controlled pipelines.