All about USTAR Files

The USTAR file type is primarily associated with POSIX tar Compressed Archive.

USTAR	File extension: USTAR
	File type:	POSIX tar Compressed Archive files

What is a USTAR file?

USTAR files mostly belong to POSIX tar Compressed Archive. Use our "Online USTAR Text Viewer" below to analyze your USTAR file and to see all text it contains.

How can I open a USTAR file?

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

Online USTAR Text Viewer

Choose your .ustar file to analyze

or drag and drop it here

Online File Viewer

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Can't Open Your .USTAR File? Try These Steps

USTAR files can come from different programs and aren't universally openable.

Identify the Source: These files often come from Unix/Linux system administrators or automated backup workflows, suggesting they are POSIX tar Compressed Archives.
Check the Header: Open the file in a hex viewer to inspect its first bytes.
- Seeing "ustar" near byte 257 confirms it is a standard POSIX tar archive.
- Readable text or XML might indicate a misnamed log or configuration file.
Use the Original Software: The original program is usually required to extract the contents. Try archiving tools like GNU tar, 7-Zip, or WinRAR, and ask the sender if you remain uncertain.
Use this Webpage: Drag and drop your file onto this page to detect its format, extract readable metadata, and preview its contents.

Technical Data for USTAR File Extension

Related files:

io, arq, sign

Mime type:

application/x-ustar, multipart/x-ustar

a ustar POSIX tar Compressed Archive file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with USTAR files

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