NOVA JWT Decoder is a free, browser-based tool that allows developers to quickly analyze JSON Web Tokens without any registration. Simply paste a JWT into the interface to instantly view its decoded header and payload in clean, readable JSON format. The tool automatically extracts essential token details such as the signing algorithm, token type, issuer, subject, audience, and timestamp information for both issuance and expiration. A real-time validity indicator displays whether the token is currently active, along with the remaining time until expiry.
Designed for developers, API testers, and security analysts, the decoder supports common JWT workflows including OAuth and OpenID Connect validation. It provides clear visual feedback on token structure and status, helping identify issues like expired tokens or malformed claims. All processing occurs locally in the browser, ensuring privacy and no data retention. The tool is accessible directly through a web interface with no setup required, making it ideal for quick inspections during development, debugging, or security assessments.