JWT Analyzer & Crafter
Deeply dissect JSON Web Tokens. Decode payload data, analyze human-readable expiration times, and instantly craft or re-sign completely new mock tokens for testing.
Header
Verify & Re-Sign Signature
HS256 ONLYPayload Data
Craft New Token
Modified the header or payload above? You can instantly generate and copy the updated token string. If you entered a Secret, the signature is safely recalculated.
Guide & Insights
The Ultimate JWT Diagnostics Lab
Stop manually converting timestamps or fighting command-line tools to forge test tokens. Our JWT Analyzer & Crafter deeply dissects your JSON Web Tokens directly in the browser, translating technical payloads into human-readable insights, and allowing you to instantly craft entirely new valid tokens on the fly.
Deep Dissection
Paste any JWT to instantly split the raw string into visually color-coded segments, revealing the underlying JSON of the Header and Payload fields cleanly and format-perfect.
Humanized Times
We automatically detect exp (expiration) and iat (issued at) Unix timestamps and instantly translate them: no math needed. Know precisely if a token expired "2 hours ago" or expires "in 30 mins".
Crafter & Signer
Need to mock an admin session? Edit the JSON payload right in the browser, provide a secret key, and the tool leverages native Web Crypto to instantly generate a legally-signed mock token for your local testing.
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