JWT token inspector

TokenGUARD

Free100% offlineWindows · .NET 10

TokenGUARD is a free, fully offline JWT inspector. Paste a token and read its header and payload, interpreted claims (including Entra), a risk analysis and signature verification (HMAC / RSA / ECDSA) — nothing ever leaves your machine.

Download

ApplicationWindows installer (.exe) Source codeFull project (.zip) User guide (FR)HTML User guide (EN)HTML

Free download. No account, no telemetry — the tool runs entirely on your machine.

What it does

Decodes JWT header and payload
Interpreted claims, including Microsoft Entra
Risk analysis of the token
Signature verification: HMAC, RSA, ECDSA
100% offline — the token never leaves your machine
Bilingual FR / EN, dark theme, self-contained app

Screenshots

TokenGUARD — Inspect a JWT: header, payload, time validity, risk — Inspect a JWT: header, payload, time validity, risk

TokenGUARD — Anatomy of a JWT and offline processing — Anatomy of a JWT and offline processing

TokenGUARD — About & feature list — About & feature list

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