Learning
What is JWT?
A JSON Web Token is a compact format for signed claims, commonly used in authentication systems.
Last updated 2026-07-12 · 5 min read
JWT structure
A JWT usually has header, payload, and signature segments separated by dots. The header and payload are Base64URL-encoded JSON.
Decode versus verify
Decoding shows the claims. Verification checks whether the signature matches an expected key and algorithm.
Related tools
JWT Inspector ProDecode, verify, generate, compare, audit, and timeline JWTs locally in the browser.Encoding ToolkitEncode and decode Base64, Base64URL, URLs, HTML entities, Unicode, hex, binary, ASCII, and UTF-8 locally.JSON ToolkitFormat, validate, visualize, query, diff, flatten, convert, and generate types from JSON locally.