Opening a CAJ File

The CAJ file type is primarily associated with CAJViewer.

CAJ	File extension: CAJ
	File type:	journal article

What is a CAJ file

CAJ files mostly belong to CAJViewer by CNKI. A CAJ file is an academic journal article saved in the document format(s) used by CNKI (short for China National Knowledge Infrastructure). Its contents may be saved as plain text, PDF, or a different format. Information saved in a CAJ file includes text, author information, and metadata for an article. CAJViewer is the default program for viewing a document saved in a CAJ file.

How do you open CAJ files?

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

Online CAJ Text Viewer

Choose your .caj file to analyze

or drag and drop it here

Online File Viewer

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CAJ file format details:

A file format defines how the data in the file is structured. 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. Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. So a detailed analysis of a file is vital in order to determine the format and the associated program. Below you will find our evaluation of the CAJ files:

CAJ is a very common file type and includes various formats for various programs. However, the following two file formats are common:

• 30% of all CAJ files start with the bytes CAJ, which are crucial for this file format. The contents of these files cannot be read by a human; only a computer program can interpret the data. The file size is in the range of 870 KB to 5 MB. This file type is based on cutting-edge technology. These files can be linked to soosci.
• 25% of all CAJ files start with the magic bytes 48 4E 00 00, which are always the first bytes of this file format. The contents of these files cannot be read by a human; only a computer program can interpret the data. The files are on average 5 MB in size and range from 2 MB to 12 MB. Certain words are almost always found in the files, such as Tsinghua Tongfang Optical Disc Co.,Ltd.

All other CAJ files (45%) have no uniform format, the following 6 formats exist: Chinese Academic Journal, CAJ database, KDH and FILEMECLT. If you want to find out what your CAJ file contains, drag and drop it onto this page.