{"id":48,"date":"2026-02-27T08:33:27","date_gmt":"2026-02-27T08:33:27","guid":{"rendered":"https:\/\/poznayu.com\/en\/?p=48"},"modified":"2026-02-27T10:59:18","modified_gmt":"2026-02-27T10:59:18","slug":"json-for-beginners-what-it-is-and-where-its-used","status":"publish","type":"post","link":"https:\/\/poznayu.com\/en\/json-for-beginners-what-it-is-and-where-its-used\/","title":{"rendered":"JSON for Beginners: What It Is and Where It’s Used"},"content":{"rendered":"
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In the world of modern technology, data is transmitted and stored in many different formats, but JSON holds a special place among them.<\/span><\/p>\n

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This abbreviation stands for JavaScript Object Notation. Despite the name, the format has long moved beyond just one language and has become a universal way to exchange information between all kinds of programs written in Python, Java, PHP, or any other language. At its core, JSON is simply a text file put together according to strict but simple rules that both computers and humans can understand.<\/span><\/p>\n

When a developer opens such a file, they can immediately see the structure: where the names are stored, where the values are, where the lists are. It’s this transparency and convenience that have made JSON the de facto standard for web services, mobile applications, and even configuration files.<\/span><\/p>\n

Introduction<\/span><\/h2>\n

JSON is simply a way to write down information so that it’s easy for both humans and computers to understand.<\/span><\/p>\n

Imagine you are filling out a form: there are fields (name, age, city) and there are answers. In JSON, these are called “key-value” pairs. The key is the name of the field, and the value is what you put in it. All the information is grouped using curly braces\u00a0<\/span>{}<\/code>, and if you need to list several similar things (like a list of favorite movies), you use square brackets\u00a0<\/span>[]<\/code>.<\/span><\/p>\n

The simplest example of JSON looks like this:\u00a0<\/span>{ \"name\": \"John\", \"age\": 30, \"city\": \"New York\" }<\/code>. Here, inside the curly braces, are three facts about a person. Each fact is written according to the rule: first the field name in quotes, then a colon, then the value itself.<\/span><\/p>\n

If there are several values, they are listed separated by commas. This is the foundation of JSON \u2014 write your data according to these simple rules, and any programming language will be able to read and use it.<\/span><\/p>\n

History of Creation and Reasons for Popularity<\/span><\/h2>\n

The JSON format was created by American programmer Douglas Crockford in the early 2000s. Before it, the main method for data exchange was XML \u2014 a powerful but verbose language that required a lot of space and was difficult to perceive.<\/span><\/p>\n

Crockford standardized a simple idea: take the object syntax from JavaScript and make it an independent language for data. XML uses tags that need to be opened and closed, which creates a lot of extra text. JSON, on the other hand, describes data compactly and clearly.<\/span><\/p>\n

Imagine two programs written in different languages need to agree on a complex transaction. Without a universal translator, it would be too complicated for them. JSON became that translator \u2014 simple, fast, and understandable for all sides.<\/span><\/p>\n

Where JSON is Used<\/span><\/h3>\n

JSON is encountered so often that we use it dozens of times a day without even noticing.<\/span><\/p>\n