Opening CXI Files

The CXI file type is primarily associated with HDFView.

CXI	File extension: CXI
	File type:	data file

What is a CXI file?

CXI files mostly belong to HDFView.

Scientific Data: CXI files often use the HDF5 format to store X-ray imaging data. This format supports a hierarchical structure that can hold large datasets with metadata. You can open these files with specialized tools such as HDFView.

Game File: In some cases, CXI files serve as 3DS game save files (for example, used in titles like Tomodachi Life). For these, the Citra Emulator is a common tool to view or modify the saved data.

Flowchart File: Another variant of the CXI format is based on XML. These files are used by flowchart design programs (sometimes noted as a CX Designer Flowchart File) and work with applications like Flowgorithm. More details are available on the Flowgorithm website.

FilExt.com note: To decide which tool to use, inspect the file's internal structure (for instance, look for XML tags or HDF5 markers). This helps determine whether it holds scientific data, game save information, or flowchart designs.

How to open a CXI file

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

Online CXI Text Viewer

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Online File Viewer

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CXI file extension format:

Each file has a definite file format, that is, how the stored data is arranged in the file. The initial characters of a file are called signature, sometimes also referred to as "magic bytes". The signature can be used to infer the file format. Nonetheless, different programs can utilize the same file extension to represent distinct file formats. Double-clicking on the file often results in an error when opening. So a detailed analysis of a file is vital in order to determine the format and the associated program. Our examination of the CXI files comes to the following conclusion:

The CXI file extension is not found very often and has no uniform or dominant file format. However, the following two file formats are common:

• 15% of all CXI files use the same file format, which have the signature 0B 7F 1C FE B5 E3 91 20 24 B1 E3 4F E0 FC EA EE. They consist of illegible, cryptic characters. The files are often between 70 MB and 430 MB in size. The file name Tomodachi Life.cxi is characteristic of these files.
• 10% of all CXI files are Coherent X-ray Imaging format files, which are using the popular HDF5 file format. HDF5 is short for Hierarchical Data Format version 5. It is an open source file format for storing and organizing large amounts of data. If you open these files in a text editor, you will see only illegible characters. The files are on average 21 MB in size and range from 43 KB to 53 MB. Several words can almost always be found in the files, e.g. TREE. The following filename is common: cxidb-4.cxi.

All other CXI files (75%) have no consistent format, often e.g. XML. Sometimes used for pokemon, decrypted, pokemonx, game, randomlocke, alpha or ultra. Drag & drop your file here to see the file format and a preview of your CXI file!