JSON Tools
JWT Decoder
Decode JWT headers and payloads without validating the token signature.
Decode JWT header and payload sections so you can inspect claims such as sub and exp.
Common edge cases
Base64Url padding is often omitted in JWTs. This decoder restores it before parsing JSON.
Language snippets
const payload = JSON.parse(atob(token.split(".")[1]));FAQ
Does this verify signatures?
No. The MVP decodes token sections only.
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