Frequently Asked Questions
JWT Libraries
Popular JWT implementations across languages.
jsonwebtoken (Node.js)
The most popular JWT library for Node.js. Sign, verify, and decode JWTs.
jose (Universal JS)
Pure JavaScript JWT/JWK/JWS library — works in browsers, Node.js, Deno, and edge runtimes.
PyJWT (Python)
Python implementation of JSON Web Tokens (RFC 7519).
golang-jwt (Go)
Community fork of the go-jwt library for Go with active maintenance.
java-jwt (Java)
Auth0's Java JWT implementation supporting RS256, HS256, and more.
ruby-jwt (Ruby)
Pure Ruby JSON Web Token implementation following RFC 7519.
Specifications
IETF RFCs that define the JWT ecosystem.
RFC 7519 — JSON Web Token
The foundational specification for JWT structure and claims.
RFC 7518 — JSON Web Algorithms
Defines cryptographic algorithms for JWS and JWE.
RFC 7515 — JSON Web Signature
Specifies the JWS compact serialization format.
RFC 7517 — JSON Web Key
Defines the JWK format for representing cryptographic keys.
Documentation
Guides and references for using JWTSecrets tools and APIs.
Quick Start Guide
Generate your first JWT secret and integrate it in 5 minutes.
Key Rotation Guide
Zero-downtime JWT secret rotation using the kid header.
Algorithm Selection
When to use HS256, RS256, ES256, and other JWT algorithms.
Security Best Practices
Comprehensive JWT security checklist for production.
Contact Us
Questions, feedback, or enterprise inquiries — we'd love to hear from you.