JSON Validator

JSON Validator - JSONLint is a web-based tool to validate JSON String/Object.

JSON has strict syntax requirements, unlike HTML. So validation of JSON text is necessary, and our online JSON Validation tool can perform validation.

Why do we use JSON files?

The word JSON stands for "JavaScript Object Notation," It is a syntax for storing and transmitting the data. The JSON format is often used for serializing and transferring structured data over a network. It is mainly used to send data between a server and web applications. The web services and APIs highly use JSON format to provide public data.

What are JSON and its advantages?

The JSON has become quite popular and is a preferred format for transferring data because

  • It is a lightweight data interchange format.
  • A wide range of browsers supports it.
  • The data is stored in the arrays so the data can be shared easily. That is why web services and APIs highly use JSON format to provide public data.
  • The JSON format is popular because it is easy to use, and its syntax is understandable; that is why it is preferred over XML.
  • JSON is fast, as its files take less space and make its execution better and faster.
  • You do not need any complex versions of the code forms, as its syntax is lightweight, so it is efficiently executed and provided you a swift response.

Data types and elements of JSON

In JSON, the objects are enclosed in the curly brackets and are in keys/values format. Where the keys are the strings and the values are in the valid JSON format. The ":" sign separates the key and value, and keys/values pairs are separated by "," (comma) character. You can access the values by either using a dot or a square bracket notation. And you can access the name key by entering a dot notation.

In JSON, the arrays are similar to the JS. That can hold a string, numbers, objects, Boolean, null or extra arrays. In JS, you can add more functions and valid JS expressions. These arrays include multiple values and have an ordered list of values. The array can become a value of an object, and you can easily access them using an index number.

Standards to follow in JSON

There are just a few rules that you need to remember in JSON format:

  • It includes the objects that are encapsulated within the opening and closing brackets { }.
  • An empty object can be represented by { }.
  • It includes the arrays that are encapsulated within the opening and closing square brackets [ ].
  • An empty array can be represented by [ ].
  • A key-value pair represents a member.
  • The key of a member should be in double-quotes.
  • Each member should have a unique key within an object structure.
  • The value of a member must be in double-quotes if it's a string.
  • The boolean values are expressed using the true or false literals in lower case.
  • The number of values is expressed using a double-precision floating-point form. Scientific notation is supported.
  • The numbers should not have leading zeroes.
  • "Offensive" characters in a string need to be escaped using the backslash character.
  • The null values are represented by the invalid literal in the lower case.
  • Other object types, such as dates, are not correctly supported and should be converted to strings.
  • A comma must follow each member of an object or each array value in JSON format if it's not the last one.
  • The common extension for JSON files is '.json'
  • The mime type for JSON files is 'application/JSON.' in JSON format.

What is a JSON schema?

JSON Schema is a way of standardization for JSON-based format for defining the structure of JSON data. That was written under the IETF draft, which expired in 2011.

  • JSON Schema describes your existing data format.
  • JSON Schema provides clear, human, and machine-readable documentation.
  • JSON Schema provides complete structural validation, useful for automated testing and validating client-submitted data.

How to verify the JSON structure through JSON Validator?

A JSON Validator confirms that your JSON structure is according to the standards provided by JavaScript-oriented notation. The JSON format becomes quite popular over time. And it becomes a preferred way for data transmission. Especially when you are dealing with a complex data structure, it is preferred that you must check whether your data is valid and it is providing you the desired result or not.

Douglas Crockford developed the JSON format. It is based on the JavaScript language. The JSON contains elements that are similar to JavaScript.

To validate your JSON structure by using JSON Validator. Do the following steps.

  • Open the Online JSON Validator.
  • You can either copy and paste the JSON code or use the "Load from URL" or "Browse" option to upload it.
  • It helps you in checking the JSON syntax.
  • The tool will automatically detect the problem in the JSON code and highlight the issue.
  • By clicking on the text "Sample" on the top right corner of the tool, you can upload the sample data to check it's working.