jwt/ruby-jwt

Analysis updated 2026-07-03

★ 3,670RubyAudience · developerComplexity · 2/5Setup · easy

Mindmap

mindmap
  root((ruby-jwt))
    What it does
      Encode tokens
      Decode and verify
      Claim validation
    Signing methods
      HMAC shared secret
      RSA key pairs
      ECDSA
      RSASSA-PSS
    Use cases
      API authentication
      Stateless sessions
      Identity provider tokens
    Key features
      Expiry checking
      Audience validation
      JWKS client

mindmap root((ruby-jwt)) What it does Encode tokens Decode and verify Claim validation Signing methods HMAC shared secret RSA key pairs ECDSA RSASSA-PSS Use cases API authentication Stateless sessions Identity provider tokens Key features Expiry checking Audience validation JWKS client

Click or tap to explore — scroll the page freely

What do people build with it?

USE CASE 1

Add JWT-based login to a Ruby or Rails API so users authenticate with a signed token instead of a database session.

USE CASE 2

Verify tokens from Google or Auth0 by fetching their published JWKS key sets and letting the library handle signature checking.

USE CASE 3

Issue access tokens with expiry and audience claims, then decode and validate them on every incoming API request.

USE CASE 4

Build a stateless auth flow where the server never stores session data, just signs and later verifies the token.

What is it built with?

RubyRubyGems

How does it compare?

	jwt/ruby-jwt	sds/scss-lint	mikel/mail
Stars	3,670	3,669	3,665
Language	Ruby	Ruby	Ruby
Setup difficulty	easy	easy	easy
Complexity	2/5	2/5	2/5
Audience	developer	developer	developer

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min

Add to your Gemfile and run bundle install, no external services or configuration needed to get started.

In plain English

This is a Ruby library for creating and verifying JSON Web Tokens, commonly known as JWTs. A JWT is a small, self-contained piece of data used for authentication and authorization in web applications. When a user logs in, a server can issue them a token containing their identity and any permissions. The user's browser or app then sends that token with future requests, and the server can verify it without needing to look up a session in a database. The library handles both sides of that process: encoding (creating a signed token from a payload) and decoding (reading and verifying a token someone sends back). It supports the main signing methods used in practice, including HMAC with shared secrets, RSA and ECDSA with public and private key pairs, and RSASSA-PSS. A separate companion gem covers the EdDSA algorithm if you need it. You can also plug in your own custom signing logic. Beyond basic encode and decode, the library supports claim verification, which means it can automatically check that a token is not expired, is being used within its valid time window, is intended for the right audience, and was issued by the expected server. These are standard JWT claims defined in the specification, and the library handles them with options you pass when decoding. For working with JSON Web Key Sets (the format that public identity providers like Google or Auth0 use to publish their verification keys), the library includes a client that can fetch and cache key sets from a remote URL. Installation is via RubyGems or Bundler in the usual way. The README includes extensive code examples for each signing algorithm and configuration option.

Copy-paste prompts

Prompt 1

Using the ruby-jwt gem, write Ruby code that creates a signed JWT containing a user ID and a 1-hour expiry using HMAC-SHA256, then decodes and verifies it.

Prompt 2

Show me how to use ruby-jwt to verify a Google OAuth2 ID token by fetching Google's JWKS endpoint and caching the keys.

Prompt 3

Write a Rails before_action that reads a JWT from the Authorization header, verifies it with ruby-jwt, and sets current_user from the decoded payload.

Prompt 4

Using ruby-jwt, demonstrate decoding a token while enforcing that it is not expired and that the audience claim matches 'my-app'.

Prompt 5

Write a Ruby helper that issues a 24-hour access token and a 30-day refresh token using RSA private/public key pairs with ruby-jwt.

Frequently asked questions

What is ruby-jwt?

A Ruby library for creating and verifying JSON Web Tokens (JWTs), supporting HMAC, RSA, and ECDSA signing and automatic validation of expiry, audience, and other standard claims.

What language is ruby-jwt written in?

Mainly Ruby. The stack also includes Ruby, RubyGems.

How hard is ruby-jwt to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is ruby-jwt for?

Mainly developer.

Open on GitHub → Explain another repo

This repo across BitVibe Labs

Scan in gitsafehub Deploy in gitdeployhub jwt on gitmyhub

Verify against the repo before relying on details.