JSON Web Token vs Keycloak: What are the differences?
JSON Web Token: A JSON-based open standard for creating access tokens. JSON Web Token is an open standard that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. This information can be verified and trusted because it is digitally signed; Keycloak: An open source identity and access management solution. It is an Open Source Identity and Access Management For Modern Applications and Services. It adds authentication to applications and secure services with minimum fuss. No need to deal with storing users or authenticating users. It's all available out of the box.
JSON Web Token and Keycloak belong to "User Management and Authentication" category of the tech stack.
JSON Web Token is an open source tool with 2.59K GitHub stars and 259 GitHub forks. Here's a link to JSON Web Token's open source repository on GitHub.