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.JSON File Extension

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File TypeJavaScript Object Notation File

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CategoryWeb Files


This file is saved in a plain text format. You can open and view the contents of this file using a text editor.

What is a JSON file?

A JSON file is a standard data interchange format used to store simple data structures and objects. The file uses a lightweight, text-based, human-readable format. It was originally based on a subset of JavaScript, but is considered a language-independent format, being supported by many different programming APIs.

More Information

JSON is commonly used in Ajax Web application programming. It is becoming increasingly popular as an alternative to XML.

While many applications use JSON for data interchange, they may not actually save ".json" files on the hard drive since the data interchange occurs between Internet-connected computers. However, some applications do enable users to save ".json" files. One example is Google+, which uses JSON files for saving Profile data. After logging in, you can choose the "Data liberation" page and select "Download your Profile data."

NOTE: Mozilla Firefox saves bookmark backups using JSON files. The files are saved to the Firefox user profile directory within a folder called bookmarkbackups. You can also make manual backups of Firefox bookmarks and import them into a different copy of Firefox. To import, open the bookmark Library, click the import/export button in the top bar, choose Restore → Choose File..., and then select your JSON backup file.

Programs that open JSON files
Microsoft Windows LogoWindows
Altova XMLSpy
Microsoft Notepad
Microsoft WordPad
Other text editor
Mozilla Firefox
Mac OS X LogoMac
Apple TextEdit
Bare Bones TextWrangler
Other text editor
Mozilla Firefox
Linux LogoLinux
GNU Emacs
Other text editor
Mozilla Firefox
Updated 3/31/2016