A daily updated filename extension database!

JS file extension

The table below provides useful information about the .js file extension. It answers questions such as:

  • What is the .js file?
  • What program do I need to open a .js file?
  • How can the .js file be opened, edited or printed?
  • How can I convert .js files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 1 alias(es) found in database

✅ JavaScript

JavaScript .js file icon
JS file is a JavaScript. JavaScript is an interpreted computer programming language. It was originally implemented as part of web browsers so that client-side scripts could interact with the user, control the browser, communicate asynchronously, and alter the document content that was displayed.
Category: Development files
Application: Internet Explorer
Mime-type: text/javascript
Magic number: -
Magic string: -
Sample: -
JS aliases:
JS related links:
JS related extensions:
Hypertext Markup Language Document

Java Archive

Java Source Code

Cascading Style Sheets

JavaScript Style Sheet

Flash JavaScript

JavaScript Module

Handlebars Template

Rhino Compiled Javascript

WMLScript File

✅ JavaScript Style Sheet

JavaScript Style Sheet .jss file icon
JSS file is a JavaScript Style Sheet. JavaScript Style Sheets (JSSS) was a stylesheet language technology proposed by Netscape Communications Corporation in 1996 to provide facilities for defining the presentation of webpages.
Category: Development files
Application: Internet Explorer
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
JSS aliases:
JSS related links:
JSS related extensions:
Hypertext Markup Language Document

Cascading Style Sheets


CSS Backup

Other types of files may also use the .js file extension.

🚫 The .js file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

hs, is, jc, je, jw, jx, jz, ks, ms, ns, sj, us, ys

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Haskell Source
English Language Info File
Modula-3 Intermediate Assembly Code
JustWrite Document
LaserTank High Scores Data
MongoDB Namespace File
Cocoon JX Template
Modula-3 Intermediate Assembly File
Google Science Journal Data
JamesZhu Browser Database

🔴 Can't open a .js file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .js file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .js file extension, write to us!

Browser: Abbreviation Application Archive Audio Configuration Data Development Disk Image Document Ebook Font Game Data GIS Graphic Malware Multimedia Other Project Scam Unknown Video
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