DEV / 06 · Developer tools
JWT decoder
Read the header and payload of a token without sending it anywhere.
The signature is not checked here. Anyone can edit a payload and re-encode it, so a token that decodes cleanly proves nothing about who issued it or whether it was altered — only a server holding the key can decide that. Nothing you paste leaves this tab.
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Paste or type something on the left and the result appears here.
Runs in this tab. Nothing you paste is uploaded.
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