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JavaScript source code script
File type: Program executable file, Source code and script file, Internet related file, Email attachment blocked file, Dangerous and malicious file
Files with js extension can b commonly found as JavaScripts. Used to execute scripts on internet pages and such.
Found 4 different file type records with the same js filename suffix.
File type category:
Program executable file
Source code and script file
Internet related file
Email attachment blocked file
Dangerous and malicious file
Date updated: June 27, 2025
File extension js is generally mainly related to JavaScript scripting language and used for files that contain JavaScript language source code. JavaScript was standardized in the ECMAScript language specification.
Mostly used for client-side scripting on internet webpages.
The JavaScript Document object is the container for all HTML HEAD and BODY objects associated within the HTML tags of an HTML document.
Note: Since January 2017, Gmail blocks .js files in attachments because they are often used to distributed ransomware or other malicious software.
MIME types used for JavaScript .js script files:
application/x-javascript
text/javascript
application/javascript
Any text editor is able to view or edit *.js files.
JavaScript is source code that cannot be transformed to other file formats.
Software applications that can open js files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Software applications that can edit js files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Software capable of saving js files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Software apps that create js files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Anyone who ever had a website sooner or later discovers that his web is screwed in some of the versi...
File type category:
Source code and script file
Date updated: June 27, 2025
The js file extension is used for files written in ECMAScript language.This ECMA Standard is based on several originating technologies, the most well known being JavaScript (Netscape) and JScript (Microsoft).
The language was invented by Brendan Eich at Netscape and first appeared in that company’s Navigator 2.0 browser. It has appeared in all subsequent browsers from Netscape and in all browsers from Microsoft starting with Internet Explorer 3.0.
The development of this Standard started in November 1996. The first edition of this ECMA Standard was adopted by the ECMA General Assembly of June 1997.
That ECMA Standard was submitted to ISO/IEC JTC 1 for adoption under the fast-track procedure, and approved as international standard ISO/IEC 16262, in April 1998.
Mime types:
application/ecmascript
Use any text editing tool to view content of the *.js files.
Probably can be exported to other formats.
Software applications that can open js files:
Microsoft Windows
Netscape Navigator
Microsoft Windows NotePad
Software applications that can edit js files:
Microsoft Windows
Microsoft Windows NotePad
Software capable of saving js files:
Microsoft Windows
Microsoft Windows NotePad
File type category:
Source code and script file
Date updated: March 29, 2019
The js file extension is associated with JACOsub, a subtitle editor for the Commodore AMIGA computers, developed by Alex Matulich that allows users to add subtitles to videos.
The js file stores script used by JACOsub tool.
Use compatible tools to open *.js files.
Probably cannot be converted to anything else.
File type category:
Settings, options, themes or skins file
Date updated: June 27, 2025
Record marked as obsolete and not updated for a long time.
The js file extension is associated with the Netscape Navigator and later with Mozilla Firefox and Seamonkey web browsers for Microsoft Windows, OS X and Linux.
The js file stores configuration data used by older versions of these web browsers.
Mime types:
application/x-ns-proxy-autoconfig
Software apps that manage or store settings in js files:
Apple macOS / Mac OS X
Linux/Unix
Language
