JSON & Local Storage — Free JavaScript Tutorial
Learn JSON & Local Storage in JavaScript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn JSON & Local Storage in JavaScript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
JSON & Local Storage in JavaScript
JSON (JavaScript Object Notation): text format for data exchange. `JSON.stringify(obj)` converts object to JSON string. `JSON.parse(str)` converts JSON string to object.
Local Storage: browser storage that persists across sessions. `localStorage.setItem(key, value)`. `localStorage.getItem(key)`. `localStorage.removeItem(key)`.
Since localStorage only stores strings, always stringify objects before storing and parse after reading.
`sessionStorage` works the same way but is cleared when the browser tab is closed.
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