How to open a .WAR file online
No extra software to download or install.
Pick your .WAR file
Drag it in or click to choose it. We read its contents list first, so it opens right away without unpacking everything.
Browse what's inside
See every file with its size, how much it's compressed and its date, and search by name across all the folders.
Preview or download
Click a file to preview text or images, or save just that one. Need everything? Download it all as a single ZIP.
About .WAR files
What a .WAR file is, and what's inside it.
A WAR (Web Application Archive) is the standard package format for a Java web application. You do not open it like a document; you deploy it to a servlet container such as Apache Tomcat by dropping it into the webapps/ folder. To inspect the contents, rename the file to .zip and open it with 7-Zip.
Programs that open .WAR files
| Full name | Web Application Archive (Java WAR) |
|---|---|
| Developer | Sun Microsystems (now Oracle); part of the Java Servlet / Jakarta EE specification |
| First released | 1999 (Java Servlet 2.2 / J2EE 1.2) |
| Category | Archives |
| MIME type | application/java-archive |
| Signature | 50 4B 03 04 "PK" - standard ZIP local file header |
Related viewers
Found something inside the archive? Open it here.
Do I have to unpack the whole .WAR file?
No. The viewer reads its table of contents first and only unpacks a file when you click it. That works even with multi-gigabyte archives, because we read just the bytes we need.
Can I open password-protected archives?
Yes, for ZIP (ZipCrypto and AES) and 7Z. You'll be asked for the password,. We can't recover forgotten passwords.
Is my .WAR file uploaded anywhere?
No. The code that unpacks the file is downloaded once and then reused.
Why does a .docx or .apk open as an archive?
Because they are ZIP archives under the hood. Office documents, Android apps, Java programs and EPUB books all use ZIP as their container.
What about split archives (.001, .z01, .part1.rar)?
Multi-part archives need all their parts. Today you can open the first part to see the file list; joining parts is on our roadmap.
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