A lightweight data format used to send and store structured data.
JSON (JavaScript Object Notation) is the universal format for sending data between systems. It looks like JavaScript objects: key-value pairs, arrays, strings, numbers, and booleans. Nearly every API sends and receives JSON.
When your Frontend fetches data from a REST API Endpoint, the response is JSON. Edge Functions return JSON. Middleware parses JSON request bodies from HTTP requests. Webhooks deliver JSON payloads. Data is sent as JSON over HTTPS. Parsing invalid JSON requires Try/Catch to prevent crashes.
JSON is used for configuration files (package.json for npm, tsconfig.json for TypeScript) and Database records. Supabase, React, and virtually every web service communicates using JSON. Understanding JSON is essential for Full Stack development.
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