All about JSS Files

The JSS file type is primarily associated with Microsoft Office Word.

JSS	File extension: JSS
	File type:	compressed archive

What is a JSS file

JSS files mostly belong to Microsoft Office Word. JSS files may use one of two internal formats. In many cases the file acts as a compressed archive that holds a Word web archive. This archive is created using the ZIP format and bundles content like HTML or XML, which is processed by Microsoft Office Word.
In other cases the file may be built as a PDF document. Such files follow PDF structure and are usually opened with Adobe Acrobat Reader.
Key details compiled by FilExt.com:

ZIP Archive: The file packages a Word web archive as a compressed container. Open it with Word or a file decompression tool to inspect its contents.

PDF Format: The file is a PDF document. Open it with a PDF reader.

JavaScript Style Sheet: Some sources label it as a JavaScript Style Sheet. Verify the file’s structure if it does not open as expected.

FilExt.com tip: Use file properties or a magic-number tool to decide which format your JSS file uses.

How can I open a JSS file?

You need a suitable software like Microsoft Office Word to open a JSS 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 JSS file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a JSS file directly in the browser:. Just drag the file onto this browser window and drop it.

Online JSS Text Viewer

Choose your .jss file to view

or drag and drop it here

Online File Viewer

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How to convert JSS files to ZIP, RAR, 7Z, TAR, GZ, ...

1. Just click the "Choose your .jss file to view" button on this page.
2. Your JSS file will then be displayed in the browser.
3. Now click on "Save as..." at the top of the page.
4. Then select the file format (e.g. ZIP, RAR, 7Z, TAR, GZ, ...) you want.
5. Your file will be converted and downloaded.

JSS file format:

Why is it important to know the file format? This is the only way to find out which program to use to 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. However, different programs can use the same file extension. Furthermore, a file extension can be renamed incorrectly and double-clicking on it will then display an error when it is opened. When there is a problem with a file, the first step to solving it is to determine the file format. Below you will find our evaluation of the JSS files:

JSS is not a common file extension and includes different formats for the applicable programs. The two most common formats are as follows:

• 45% of all JSS files are based on the zip format, so several files are combined and compressed into one JSS file. A JSS file can contain up to 28 files (mostly 12 - 24). File names are e.g. [Content_Types].xml, \_rels\.rels, \docProps\app.xml, \docProps\core.xml, \word\_rels\document.xml.rels, \word\document.xml, \word\endnotes.xml, \word\fontTable.xml, \word\footnotes.xml, \word\header1.xml, \word\numbering.xml, \word\settings.xml, \word\styles.xml, \word\theme\theme1.xml and \word\webSettings.xml. You can see the included files and images by renaming the file extension to .zip and then double-clicking it. The files are 14 KB to 100 KB in size, with a median of 26 KB. Certain words are almost always found in the files, such as [Content_Types].xml. A usual file name is viewAttachedFile.jss. Files like these are sometimes connected to attached and view.
• 10% of all JSS files store the data in the PDF file format. PDF is short for Portable Document Format, is a file format to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems. These files are binary files, so they do not contain text, but only cryptic characters. The files are 60 KB to 180 KB in size, with a median of 150 KB. A common filename is DocumentViewer.jss.

All other JSS files (45%) have no uniform format, often, for example, DOC. These files sometimes refer to offer, submission, letter, fluid, print or global. If you want to find out what your JSS file contains, drag and drop it onto this page.