The File Extensions Database

.JS File Extension

  • Category: Web Files
  • Format: Text

What is an .JS file?

.JS is JavaScript File

A JS file is a text file containing JavaScript code that is used to execute JavaScript instructions in web pages. It may include functions that open and close windows, validate form fields, enable rollover images, or create drop-down menus.

JS files are referenced by web pages that incorporate JavaScript functions. They are usually imported in the <head> or <body> sections of the HTML. JS files are helpful when the same JavaScript code is used in multiple webpages as they allow the different pages to reference the code in the one external JS file.

Programs that open JavaScript File
File Viewer Plus
Adobe Dreamweaver CC 2019
Adobe ColdFusion Builder
Microsoft Visual Studio 2017
Jetbrains IntelliJ IDEA
ES-Computing EditPlus
Any Web browser
Adobe Dreamweaver CC 2019
Adobe ColdFusion Builder
Apple Dashcode
Bare Bones BBEdit
MacroMates TextMate
Any Web browser
Any text editor
File Type 2 JScript Executable Script
Category: Executable Files

Executable script written in JScript, Microsoft's version of JavaScript

How to solve problems with JS files

  • Associate the JS file extension with the correct application. On :
    Windows: Right click on any JS file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.JS files". Mac: Right click (or Ctrl-click) the JS file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .JS is JavaScript File. Because only the current version supports the latest JS file format. Search, therefore, e.g. on the N/A manufacturer website after an available .JS is JavaScript File update.
  • To make sure that your JS file is not corrupted or virus-infected, get the file again and scan it with antivirus software.