JWT.io
JWT.io is an online utility for decoding, verifying, and generating JSON Web Tokens. It allows developers to inspect the payload, header, and signature of tokens to debug authentication and authorization flows in web applications. The platform provides cryptographic verification using secret keys or public-private key pairs, supporting various signing algorithms.
Checked on Sep 30, 2026.
Alternative resources
3STF Tools
A growing collection of free, client-side developer, text, and productivity tools that run entirely in your browser with zero data tracking.
JSONing
A collection of tools and resources for working with JSON, JSONL, and JSONPath data formats.
favicondl
Extract website favicons in multiple formats and sizes by providing a domain or URL. Supports SVG, PNG, ICO, and Apple touch icons with API access.