लोकल-ओनली JWT डिकोडर

JSON Web Token (JWT) एक खुला मानक (RFC 7519) है जो पार्टियों के बीच सूचना को सुरक्षित रूप से प्रसारित करने के एक कॉम्पैक्ट और आत्मनिर्भर तरीके को परिभाषित करता है।

लोकल डिकोडिंग क्यों महत्वपूर्ण है

डेवलपर्स अक्सर डिबगिंग के दौरान ऑनलाइन टूल का उपयोग करते हैं। कई वेबसाइटें आपका टोकन अपने सर्वर पर भेजती हैं, जिससे डेटा लीक हो सकता है। हमारा टूल पूरी तरह से ऑफलाइन काम करता है।

Our Local-Only JWT Decoder solves this. By relying strictly on client-side JavaScript (using the browser's native Base64 decoding APIs), we guarantee that your token is processed entirely on your local machine. No network requests are made. No data is transmitted.

Structure of a JWT

In its compact form, JSON Web Tokens consist of three parts separated by dots (.), which are:

• Header: Typically consists of two parts: the type of the token, which is JWT, and the signing algorithm being used, such as HMAC SHA256 or RSA.
• Payload: Contains the claims. Claims are statements about an entity (typically, the user) and additional data. There are three types of claims: registered, public, and private claims.
• Signature: To create the signature part, you have to take the encoded header, the encoded payload, a secret, the algorithm specified in the header, and sign that.

: While you can decode the Header and Payload of a JWT without the secret key, you cannot verify if the token has been tampered with or if it is authentically signed without the secret. Our tool deliberately omits signature verification to remain 100% offline and stateless, protecting you from accidentally transmitting your private verification keys over the internet.