File Extension Application/JSON ?>

File Extension Application/JSON

File extension application/JSON is used to store structured JSON information. JSON is short for JavaScript Object Notation. Information in file extension application/json is stored in textual format but contains structured information. So to open application/JSON or JSON file you can just use notepad. Information in this file is encoded according to specification described at but you can also read it as a plain text since it is quite easy to comprehend.
Typically JSON files are used within software to exchange information. JSON files could contain data structures, arrays which allows to encode almost any kind of information in it.
If you want to open JSON file in a text editor (for example Notepad in Microsoft Windows) you can rename file.JSON to file.txt and double click on it in file explorer.
To render JSON in an easy to read format you can search internet for “json viewer”. There are many good tools online which allow to view JSON files.

Below is a simple example of JSON file:

  "firstName": "John",
  "lastName": "Doe",
  "isAlive": true,
  "age": 25,
  "address": {
    "streetAddress": "21 2nd Street",
    "city": "New York",
    "state": "NY",
    "postalCode": "10021-3100"
  "phoneNumbers": [
      "type": "home",
      "number": "112 333-1234"
      "type": "office",
      "number": "425 444-4567"
      "type": "mobile",
      "number": "123 654-0987"
  "children": [],
  "spouse": null