JWT Decoder
Decode JWT tokens instantly to inspect header, payload, claims, and expiration data.
Both tools belong to developer tools and usually solve closely related tasks.
Developer Tools
Explore related tools you may want to use together with JWT Header Viewer or instead of it, depending on your task.
Use this JWT Header Viewer to decode only the first part of a JWT token and display the header as readable JSON. It is useful when you only need to inspect header values such as alg, typ, kid, cty, and other metadata without parsing the full payload.
Related pages are useful when JWT Header Viewer is only one step in a bigger workflow. Sometimes you need a reverse action, a cleanup step, a validator, a supporting converter, or a nearby tool in the same category.
Return to the main JWT Header Viewer page to run the tool directly.