Opening a WAR File

The WAR file type is primarily associated with Java.

WARFile Extension WAR
File extension: WAR
File type:  compressed archive file

What is a WAR file?

WAR files mostly belong to Java by Oracle. WAR stands for Web application ARchive or Web Application Resource. It is a compressed archive based on the ZIP format, and is used to package web applications written in Java. The file can also be digitally signed.

  • Contents: WAR files are used to distribute JAR files, JavaServer Pages, Java Servlets, Java classes, tag libraries and static resources for Java applications.
  • Directory Structure: A WAR archive's root directory contains the WEB-INF directory, which has the classes and lib subdirectories and the web.XML file. The classes directory stores all the Java classes that are a part of the application, and the lib directory stores all JAR files used by the application. The web.XML file contains information that defines how the web application is deployed. In addition, the root directory of a WAR file contains all files for the application. These files may also be placed in subdirectories.

The WAR file extension is also associated with a different file format, used by Konqueror. It is the format for a web page saved using the Archive Web Page plugin in Konqueror. The page and its images are saved in a single archive with the WAR (Web ARchive) extension.

How do you open WAR files?

You need a suitable software like Java to open a WAR file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your WAR file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a WAR file directly in the browser:. Just drag the file onto this browser window and drop it.

Online WAR File Viewer

Choose your .war file to view

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How to extract texts from WAR files or capture a screenshot to PDF, JPG, DOCX, TXT, ...

If you want to extract texts from WAR file or capture a screenshot, you can use our free Online WAR File Viewer:
  1. Just click the "Choose your .war file to view" button on this page.
  2. Your WAR file will then be displayed in the browser.
  3. Now click on "Save as..." at the top of the page.
  4. Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
  5. Download the converted file.

Programs that open and convert WAR files:

  1. Java by Oracle
    See the previous paragraphs to learn more about the main application. WAR files are often referred to as Java compresseds because this type of file is primarily created or used by this software.
  2. ALZip (compressed archive file) by ESTsoft
    ALZip is a utility for file compression and archiving from ESTsoft. It supports several archive formats, including WAR, which is the format for a Web Application Resource file associated with Java applications. WAR archives are based on the ZIP format, and can contain JAR files, JavaServer Pages, Java Servlets, and other resources. This file format is classified as Compressed. Related links: ALZip on Wikipedia, Download ALZip, WAR File Reference in ALZip Documentation
  3. Konqeror (compressed archive file) by KDE
    Konqueror is an open-source web browser and file manager from KDE. Archive Web Page is a Konqueror plugin that saves a web page and its images in a single archive with the WAR (Web ARchive) extension. This file format is classified as Compressed. Related links: Konqueror on Wikipedia, WAR File Reference in Konqueror Documentation, WAR File Guide, Convert MHT (Windows Web Archive) Files to WAR
  4. NetWar by .:NWO:.
  5. Tomcat (compressed archive file) by Apache
    Tomcat is an open-source web server and a container of JavaServer Pages and Java Servlets. A WAR file can be used to deploy a Java application to Tomcat. WAR archives are based on the ZIP format, and can contain JAR files, JavaServer Pages, Java Servlets, and other resources. This file format is classified as Compressed. Related links: Tomcat on Wikipedia, Deploy a WAR File to Apache Tomcat, Create a WAR File to Deploy on Apache Tomcat

WAR format details:

The file format, which is the arrangement and type of data in a file, determines which program can open the file. A file format is determined by the file extension and signature, so JPEG images have the extension .jpg and the first bytes in the file are ÿØÿ. If the file extension does not match the file format, double-clicking on the file will cause an error upon opening. If there are problems opening a file, you must first determine the file format used. Our analysis of the WAR files produces the following result:

You will often come across the WAR file type. This is primarily used by a single program. The file formats most commonly found in WAR files are:

All the rest of the WAR files (17%) have different formats, the following 4 formats exist: DICOM and UTES. Often described as management, openboxes, gcas, java, root, analytics, gateway, partner, stable, webapp, smart, bank or prop. Just click the "Choose your .war file to view" button on this page to find out what your WAR file is.

Technical Data for WAR File Extension


The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: BitZipper.war
EXEFile: %ProgramFiles%\BitZipper\BITZIPPER.EXE %1

ProgramID: File.War
EXEFile: %ProgramFiles%\ZipGenius 5\zipgenius.exe -open %1

ProgramID: PAZIP
EXEFile: %ProgramFiles%\PowerArchiver\POWERARC.EXE %1

ProgramID: PicoZip.war
EXEFile: %ProgramFiles%\PicoZip\PicoZip.exe %1

ProgramID: ZipZag.war
EXEFile: %ProgramFiles%\ZipZag\zipzag.exe %1

ProgramID: IZArc
EXEFile: %ProgramFiles%\IZARC\IZARC.EXE %1

ProgramID: ALZip.war
EXEFile: %ProgramFiles%\ESTsoft\ALZip\ALZip.exe %1

ProgramID: MimarSinan Codex
EXEFile: %SystemRoot%\explorer.exe /idlist,%I,%L

ProgramID: IZArcWAR
EXEFile: %ProgramFiles%\IZArc\IZArc.exe

ProgramID: ICEOWSDoc
EXEFile: rundll32 %SystemRoot%\system32\ShellExt\IceGUI.dll,RouteTheCall

ProgramID: uzip
EXEFile: %ProgramFiles%\ULTIMA~1\uzip.exe

ProgramID: PAZIP
EXEFile: %ProgramFiles%\Accessories\PowerArchiver\POWERARC.EXE

ProgramID: File.War
EXEFile: %ProgramFiles%\ZipGenius 6\zipgenius.exe -open

ProgramID: TzJAR
EXEFile: %ProgramFiles%\TUGZip\TUGZip.exe

ProgramID: BitZipper.war
EXEFile: %ProgramFiles%\BitZipper\BITZIPPER.exe

ProgramID: WAR
EXEFile: %ProgramFiles%\PeaZip\PEAZIP.EXE

ProgramID: IZArcWAR
EXEFile: %ProgramFiles%\IZArc\IZArc.exe


a war compressed archive file is a special file format by Oracle and should only be edited and saved with the appropriate software.

How to solve problems with WAR files

  • Associate the WAR file extension with the correct application.
  • Update your software that should actually open compressed archive files. Because only the current version supports the latest WAR file format. Search, therefore, e.g. on the Oracle manufacturer website after an available Java update.
  • To make sure that your WAR file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
  • Click here to open your .WAR file online - secure, fast, and no downloads needed.
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