Is my secret key or token exposed to any server?

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JWT Token Inspector & Decoder

In-Browser RAM

Inspect RFC 7519 JWT claims, expiration countdown, and verify cryptographic HMAC signatures in browser RAM.

Interactive Studio

100% In-Browser RAM Execution

RAM Sandbox Active•100% Client-Side. Zero server telemetry or data retention.

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Simple Workflow

Paste or drag-and-drop .jwt, .txt, or .env token.

Inspect tripartite colorized Header, Payload, and Signature.

Enter HMAC secret key to verify cryptographic signature in browser RAM.

Your data and files never leave your device. Everything processes strictly in local browser RAM memory with zero server tracking.

Built on client-side memory, Canvas API, and high-speed Gemini Cloud AI for instantaneous, frictionless output.

Common Questions

Never! Decryption and signature verification are executed 100% in local browser RAM using the native Web Crypto API (crypto.subtle.verify).

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