Jager
The smallest commonly referenced unit of Binance Coin (BNB). 1 BNB = 100,000,000 Jager. Jager is mainly useful when dealing with very small BNB amounts (fees, dust, rounding, and tiny swap outputs).
Java
A widely used, object-oriented programming language often chosen for building scalable backend systems. In crypto and fintech, Java is commonly used for exchange infrastructure, trading services, and API-based integrations.
JavaScript
A versatile scripting language that powers interactive web experiences. JavaScript is widely used in crypto for web dashboards, trading interfaces, wallet frontends, and browser-based tools.
JOMO (Joy of Missing Out)
The opposite of FOMO (Fear of Missing Out). In crypto, JOMO is the relief of not jumping into a hype-driven trade or risky market move that later turns out badly. It’s often associated with staying disciplined and sticking to a plan instead of reacting emotionally.
JPY (Japanese Yen)
The ISO currency code for the Japanese Yen. In crypto trading, JPY may appear as a fiat account currency or in trading pairs (for example, BTC/JPY), depending on the exchange.
JSON (JavaScript Object Notation)
A lightweight data format used to exchange structured information. In crypto and trading, JSON is commonly used by exchanges and tools to send data like balances, orders, trades, and error messages through APIs.
JSON-RPC
A communication standard used to request information or perform actions via remote procedure calls. In crypto, JSON-RPC is commonly used to interact with blockchain nodes (for example, querying blocks/transactions or broadcasting transactions).
JWT (JSON Web Token)
A signed token format used for authentication in web apps and APIs. JWTs help systems confirm identity and permissions without repeatedly sending a username/password. Users may encounter JWT-related issues in API troubleshooting (for example, expired or invalid tokens).