Paste a JWT to decode its header and payload.
Header
Payload
The JWT Decoder is an essential tool for developers working with authentication and authorization systems. JSON Web Tokens (JWTs) are a standard way to securely transmit information between parties as a JSON object. This tool allows you to paste an encoded JWT and instantly see its decoded components: the Header (which contains metadata like the algorithm used) and the Payload (which contains the claims or data, such as user ID, roles, and expiration time). This is extremely useful for debugging and verifying the contents of a token during development without needing to write any code.
- Paste your encoded JWT string into the "Encoded JWT" textarea. You can also use the "Paste from Clipboard" button for convenience.
- The tool will automatically decode the token as you type or paste.
- The decoded "Header" and "Payload" will be displayed in their respective sections as formatted JSON, making them easy to read and inspect.
- If the JWT is malformed or invalid, an error message will be displayed to help you identify the issue.
- You can click the copy icon on the Header or Payload cards to copy the decoded JSON to your clipboard.
This tool only decodes the token; it does not and cannot verify the signature. Verifying the signature requires the secret key or public key, which should never be shared or exposed in a client-side application. This tool is for inspecting the contents of a token, not for validating its authenticity.
IP Lookup
Find the location and details of any IP address. This tool provides information such as the country, city, ISP, and organization associated with a given IP. It also shows your own IP address on page load.
CSV Viewer
Quickly view and paginate through CSV files directly in your browser. Upload a CSV file to render its contents in a clean, searchable table format. Ideal for inspecting tabular data without opening a spreadsheet application.
Boilerplate Generator
Quickly generate boilerplate code for various project setups, such as Dockerfiles, GitHub Actions, and more. Save time on initial configuration.
Algorithm Visualizer
Visualize sorting algorithms like Bubble Sort and Merge Sort to understand how they work step-by-step. An educational tool for developers and students.