Letter J: Data Formats & File Extensions

Find data file formats and file extensions that start with the letter J, or view thousands of formats in the complete list.

With literally thousands of data file formats employed by Windows and Window-based apps, keeping track of all the file extensions employed by your software applications and programs can be quite a challenge. Fortunately, Webopedia’s Complete List of Data File Formats and File Extensions makes it quick and easy to sift through thousands of file extensions and data file formats to find exactly what you need. You can peruse the full list or search for data formats and file extensions based on the letter they start with from the table below.

Number Symbol A B C D E F G H I J K
L M N O P Q R S T U V W X Y Z Full List

Data File Formats that Begin with the Letter ‘J’

.j01 File Extension from ADP Payroll Company
.jad Java Application Descriptor extension (for installing MIDlets)
.jar Java archive file
.jas Graphics
.jav Java source code file
.java Java source code file
.jbc Jam Byte-Code Hex file
BestCrypt File
.jbd Datafile (SigmaScan)
.jbf Paint Shop Pro browser file
.jbk Juno Backup file
.jbr Jasc Paint Shop Pro Brush
.jbx Project file (Project Scheduler 4)
.jdt Accelio Capture Classic Filler
.jef Janome NH10000 Sewing Machine file
.jet Fax (Hybrid JetFax)
.jff Bitmap graphics (JPEG File Interchange Format)
.jfif JPEG image
.jfx J2 Fax File
.jhtml Dynamo Server Page
.jif JPEG/JIFF Image
Jeff’s Image Format
.jmx JMeter file
.jnb Sigma Plot Workbook file
.jnl Ingres Journal file
.jnlp Java Web Start file
.jnt Windows Journal Note file
.job Job file
Task Scheduler Task Object
AI Research file
QuestVision Vector Graphics file
.jor Journal file SQL
.jou Journal backup (VAX Edt editor)
.jp2 JPEG 2000 file
.jpc Graphics (Japan PIC)
.jpeg JPEG image
.jpf JPEG 2000 file
.jpg Bitmap graphics (Joint Photography Experts Group)
.jps Stereo Image
.jpx JBuilder Project file
.js Microsoft Scripting Language “JScript” file extension
.jsd eFAX Jet Suite Document
.jse JScript Encoded Script file
.jsf Fireworks Batch Script file
.jsh Henter-Joyce, Inc. Jaws Script Header file
.json JavaScript Object Notation file
.jsp Java Server page
.jtf Fax (Hayes JT Fax)
Bitmap graphics (JPEG Tagged Interchange Format)
.jtp Jetform file
.jup (New Planet Software) Code Crusader user’s project preferences file
.jw Text document (JustWrite)
.jwl Library (JustWrite)
.jwp Easy CD Creator Label file
JWP Document
.jxr JPEG XR file
.jzz Spreadsheet (Jazz)

Recommended Reading: An Introduction to Data File Formats and Their File Extensions

Number Symbol A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Full List

This article was originally published on June 24, 2010

Webopedia Staff
Webopedia Staff
Since 1995, more than 100 tech experts and researchers have kept Webopedia’s definitions, articles, and study guides up to date. For more information on current editorial staff, please visit our About page.

Related Articles

AutoIt Scripting Language

AutoIt is a popular and easy-to-learn scripting language used by developers since 1999 for quick software development. Here’s more about AutoIt scripting language, its...

Sales CRM

A sales CRM, or customer relationship management (CRM) tool for sales, is frequently the centerpiece of sales operations for a variety of business use...

HighLevel CRM

HighLevel is a sales and marketing customer relationship management (CRM) solution designed by the company HighLevel. Because it's uniquely designed for marketing agencies, HighLevel...

CRM Manager

A customer relationship management (CRM) manager is a person that oversees all customer and client relations within a business. They specialize in customer interactions...

Unified Endpoint Management (UEM)

As enterprise networks become increasingly distributed with growing numbers of remote workers, unified...

Mobile Workforce Management (MWM)

Mobile workforce management (MWM) refers to the tools and software used to manage...

ITSM Tools

IT Service Management (ITSM) tools are the tools involved in designing, delivering, and...