JWT Decoder
Use our free JWT Decoder to decode JSON Web Tokens online and instantly view the header, payload, expiration date, and other token details.
🔒 Your token is decoded locally in your browser and is not sent to our server.
Example JWT tokens:
Important Security Note
This tool only decodes the JWT token and does not verify its signature. A successfully decoded token is not necessarily valid or secure. Avoid pasting sensitive production tokens into public tools.
Decode JWT Tokens Online
Use this free JWT Decoder to decode and inspect JSON Web Tokens instantly. Simply paste a JWT token into the decoder to view its Header and Payload in a readable JSON format. This tool can help developers quickly understand the information stored inside a JWT while debugging authentication, APIs, and web applications.
What is JWT or Jason Web Token?
A JSON Web Token, commonly known as a JWT, is a compact token format used to securely transmit information between applications. JWT authentication is widely used in REST APIs, single-page applications, mobile apps, and modern backend systems built with technologies such as Laravel, PHP, Node.js, Java, Spring Boot, and other web frameworks.
What Does a JWT Token Contain?
A JWT typically consists of three parts separated by dots. These parts are known as the Header, Payload, and Signature.
JWT Header
The header usually contains information about the token type and signing algorithm, such as HS256 or RS256.
JWT Payload
The payload can contain claims and application data such as a user ID, role, permissions, issued time, and token expiration.
JWT Signature
The signature is used to verify that the token has not been modified and should be validated by the application or authentication server.
Why Use a JWT Decoder?
JWT tokens are commonly used during user authentication and API communication. When debugging an application, developers may need to decode a JWT token to check who the token belongs to, inspect user roles or permissions, verify token claims, and check whether the token has expired.
This online JWT Decoder makes it easy to decode the readable parts of a JSON Web Token without manually converting Base64URL encoded values. Paste your token above to instantly view the decoded JWT Header and Payload, along with issued and expiration timestamps when available.
Is Decoding a JWT the Same as Verifying It?
No. Decoding a JWT only converts the readable Header and Payload into JSON. It does not verify the token signature, confirm that the token was issued by a trusted source, or guarantee that the token is valid. A properly configured application should always verify the JWT signature before trusting the data contained in the token.