dev tools ·
in-browser ·
no install ·
open in any tab
A small, growing collection of single-page dev utilities. Each lives on its own subdomain — open the one you need, use it, close it.
No accounts. No telemetry. Just tools.
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>_jwt — token inspector
jwt.devdash.run
Decode & verify JWTs. Diff between two tokens. Edit payload, re-sign with HS256/HS384/HS512.