Decode and Inspect JWT Tokens

Decode the header and payload sections of a JSON Web Token (JWT) to inspect its claims.

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Text to encode

JWT tips

🔑

JWTs have three parts separated by dots: header.payload.signature. Each part is Base64URL encoded. Decode the first two to inspect claims.

💡

Base64URL differs slightly from standard Base64: - replaces +, _ replaces /, and padding (=) is omitted. The decoder handles this automatically.

🛡️

Never decode a JWT on an untrusted public tool if it contains sensitive data. This tool processes everything locally in your browser.

⏱️

The payload contains exp (expiry), iat (issued at), and sub (subject) claims as Unix timestamps. Convert them to see exact expiry dates.

Wprowadź

Enter your data into the tool above. Everything stays local to your browser.

Przetwórz

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Pobierz

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

✓Całkowicie darmowe — brak ukrytych kosztów, nigdy

✓Nie potrzeba konta, e-maila ani logowania

✓Pliki nigdy nie opuszczają Twojego urządzenia

✓Absolutnie brak limitów rozmiaru pliku

✓Brak znaków wodnych na żadnych wynikach

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