JSON

Lesson in the Elasticsearch Roadmap · Stage 1: Introduction

Last updated 14 September 2026

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. It's based on a subset of the JavaScript programming language, and uses a text-based format to represent data objects consisting of attribute-value pairs and array data types. JSON is commonly used for transmitting data in web applications (e.g., sending some data from the server to the client, so it can be displayed on a web page) and is a standard format for APIs and configuration files.

Study this in the interactive course See the whole Elasticsearch roadmap

Free resources to learn JSON

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JSON: common questions

Can I learn JSON in Hindi?

This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain JSON in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.

Is this JSON tutorial for beginners?

It is lesson 2 of 113 in the free Elasticsearch roadmap, in stage 1, Introduction. If you are new to Elasticsearch, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.