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Debug Authentication Issues with JWT Decoder

Inspect JWTs from your app to debug login failures, permission issues, and token expiration problems.

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πŸ”’ The token is decoded entirely in your browser. Nothing is sent to any server.

Auth Debugging tips

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When users report "I keep getting logged out," paste their token here to check the `exp` claim. Most session expiry bugs are off-by-one errors in token TTL config.

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Check the `iat` (issued at) claim to see if tokens are being refreshed correctly. If `iat` is hours old when it should be minutes, your refresh flow is broken.

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Look at the `aud` (audience) claim β€” many auth failures happen when a token issued for one service is sent to another that has different audience validation.

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Tokens are decoded entirely in your browser β€” safe to use for production tokens during debugging. The decoder never sees them server-side.

Come funziona

1
Inserisci
Enter your data into the tool above. Everything stays local to your browser.
2
Elabora
The tool processes your data instantly in your browser using JavaScript. No server, no waiting.
3
Scarica
Get your result instantly. Nothing is stored after you leave the page β€” complete privacy.

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βœ“Nessun account, email o accesso richiesto
βœ“I file non lasciano mai il tuo dispositivo
βœ“Assolutamente nessun limite di dimensione file
βœ“Nessuna filigrana su nessun output

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