Pass a JWT token and get a boolean if the token is valid, the requirements for a valid token are defined by the official RFC 7519 standard
npm
npm install jwt-valid
yarn
yarn add jwt-valid
jwtValid(JWT_TOKEN<STRING>)jwtValid('this is no valid token') // returns false
jwtValid('some.valid.token') // returns trueBrowser
Under the hood it uses the window.atob() native feature which is supported in each major browser and IE from version 10 (check mozilla dev site)
Node
Uses the native Buffer API from node (check node documentation)