Opening ZIR Files

The ZIR file type is primarily associated with Compass and Ruler.

ZIR	File extension: ZIR
	File type:	Geometry

What is a ZIR file?

ZIR files mostly belong to Compass and Ruler by Rene Grothmann. C.a.R. is dynamic geometry program. Basically, it simulates compass and ruler constructions on a computer.

How can I open a ZIR file?

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

Online ZIR Text Viewer

Choose your .zir file to analyze

or drag and drop it here

Online File Viewer

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Trouble Opening a .ZIR File? These Steps Will Help

Because .ZIR files can originate from different programs, they aren't universally openable.

Identify the Source: If received from a math teacher or student working on dynamic geometry, it is likely a Compass and Ruler file.
Check the Header: Open the file in a text editor to inspect its first lines.
- Seeing <?xml version="1.0"?> or <CaR> confirms it is an XML-based geometry file.
- Seeing "PK" or scrambled characters suggests a compressed archive or binary format.
Use the Original Software: You usually need the original program to open it; try Rene Grothmann's Compass and Ruler, or ask the sender if uncertain.
Use this Webpage: Drag and drop your .ZIR file into our viewer to detect its format, extract readable text or metadata, and preview contents.

Technical Data for ZIR File Extension

File classification:

XML

Identifier:

Hex: 3C 3F 78 6D 6C 20 76 65 72 73 69 6F 6E 3D 22 31 2E 30 22 20 65 6E 63 6F 64 69 6E 67 3D 22 75 74 66 2D 38 22 3F 3E, ASCII: .?xml.version="1.0".encoding="utf-8"?. (provided by TrID database)

Related files:

doc, off, gpk, vda

Mime type:

application/vnd.zul, text/xml

a zir Geometry is a special file format by Rene Grothmann and should only be edited and saved with the appropriate software.

How to solve problems with ZIR files

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