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Converts a JSON string into a JavaScript object. Essential for working with API responses, reading config files, or retrieving data from local storage.
Parse JSON strings
Common use with fetch()
Retrieve and parse stored data
Transform values during parsing
Handle parsing errors safely
JSON.parse(123)Only works on strings! Numbers, objects, etc. will throw errors.
JSON.parse("{'name':'Alice'}")JSON requires double quotes. Single quotes will cause errors.
Wrap JSON.parse() in try-catch when parsing user input or external data.
JSON.parse(string, reviver?)
Converts string to JavaScript object/array
Always use try-catch with untrusted data
Transform values during parsing (dates, etc.)