100% Client-Side
Private In-Browser JWT Debugger & Token Inspector
Safely inspect and decode JSON Web Tokens with zero cloud transmission. Verify expiration countdowns, claims, and HMAC signatures in complete privacy.
Private Client-Side JWT Debugger
Decode, inspect, and verify JSON Web Tokens. Your tokens are never transmitted to any server.
Presets:
Valid JWT Structure248 chars
HEADER: Algorithm & Token Type
// Header JSON will appear here
PAYLOAD: Data Claims
// Payload JSON will appear here
SIGNATURE: Cryptographic Hash
// Signature hash will appear here
Zero Server Transmission
Real-Time Expiration Countdown
UTF-8 Base64URL Decoding
1-Click JSON Copy
How to Use Private Online JWT Debugger & Token Inspector (Step-by-Step Guide)
No software installation required. Complete your task in 3 easy steps directly in your browser.
1
Paste Encoded Token
Paste any standard Bearer or JWT token string (Header.Payload.Signature).
2
Inspect Claims & Expiration
View decoded JSON Header and Payload with real-time expiration countdown.
3
Copy Formatted JSON
1-click copy individual claims or the entire decoded payload.
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Got Questions?
Frequently Asked Questions
No! Unlike traditional JWT debuggers, DocSwift runs 100% locally in your browser JavaScript memory. Zero network requests are made.