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What is a CAJ File? How to Convert CAJ to PDF?

Academic journal articles are research-based publications by scholarly experts in different fields. Meanwhile, in China, these articles are stored and shared in CAJ file format within the Chinese language. Thus, converting CAJ to PDF is essential if you want to use these academic journals for your research task. For this purpose, you will find ways within a dedicated CAJ to PDF converter, which is UPDF.

Part 1: What is a CAJ File? How Can You Use CAJ File?

CAJ is a proprietary file format specifically dedicated to academic journals within China. This file format was created by the Chinese National Knowledge Infrastructure (CNKI) as a way to save the text content of journals in an organized way. These files may have the availability of text, citations, references, annotations, and even images. Importantly, CAJ files are majorly used in China, so you'll rarely find their usage anywhere else. Thus, to use this file, you'll probably require CAJ to PDF converter.

To use the CAJ file, you need to access China Academic Journals Full-text Database software, a digital library for all sorts of academic journals in China. Hence, you can search and read your desired journal from there, but be aware that the journal would be in Chinese.

CAJ File Uses

CAJ is the file format used to store and share academic journals within China. This file format can help compress the text content of CAJ files and save them within a single file. Henceforth, sharing the research work with fellow colleagues, researchers, or academic professionals becomes easier.

Part 2: What are the Benefits of Converting CAJ to PDF Format?

As we know, CAJ is a dedicated file format for all academic journals and articles within China; thus, CAJ file to PDF conversion is essential for personal use. Let's discover the benefits of this format conversion:

  • Easily Accessible: You can access, read and edit PDF files on various PDF viewers within multiple devices and operating systems. This makes document management much easier.
  • Searching Facility: With PDF, you can conveniently search your written text using keywords. Thus, making it easy to figure out and locate desired parts of the content.
  • Maintain Layout: During document sharing, PDF documents maintain original text layouts, borders, and other formatting. Thus, the content of academic articles remains safe for future use.
  • Compatible: PDF files are smaller in size, therefore, consume less storage space as compared to CAJ files. Thus, sharing them across devices becomes simpler with easy offline viewing availability.

Part 3: How to Convert CAJ to PDF Step-by-Step with UPDF?

If you're looking to convert CAJ to PDF, UPDF is the trusted solution to have. But how to execute CAJ to PDF process using UPDF? Find the steps here:

Step 1: Create a PDF File

Launch UPDF software on your device and press the "File" tab from the top-left corner of the screen. From the drop-down, select "Create" and choose the "PDF from CAJ(.caj)" option, after which, pick your desired CAJ files by holding the "CTRL" or "SHIFT" key.

caj to pdf

Step 2: Save the Newly Created PDF

Following this, your respective PDF file will be created. To export it to your device, click the "Save as Other" icon from the toolbar on the right side. Press "Save As," pick the destination folder, and click the "Save" button.

Part 4: More Introduction About this CAJ to PDF Converter

UPDF is the best document toolkit currently available that allows users to convert their academic journals from CAJ format to PDFs efficiently. Interestingly, in the conversion process, UPDF maintains the original layout of your original journal or article, e.g., citations, references, images, headers and footers, and more. Moreover, this CAJ to PDF free converter can also convert PDFs into other formats like Word, Excel, PowerPoint, XML, Image, and more.

Moreover, UPDF also allows you to use the share feature, where you can collaborate and share academic journals with users worldwide in real-time scenarios. The platform is available for macOS, Windows, iOS, and Android.

Top Features of UPDF PDF Editor

  • Organize Document: Users can organize their downloaded journals by adding, deleting, cropping, splitting, extracting, rotating, rearranging, and replacing PDF pages in the desired layout.
  • Annotate Information: With UPDF annotation, users can add sticky notes, stamps, and stickers to their text. The options also include text highlighting, underlining, text boxes, and strikeout text. The electronic signature is also available.
  • Edit Documents: PDF Document editing is possible by means of writing and rewriting text in desired font style, size, and color. Adding a background color and watermark is a possibility. Modifying images and links can be done as well.
  • OCR Scanned Documents: By utilizing OCR technology in UPDF, users can scan and convert their images, paper documents, or scanned PDFs into readable, searchable, and editable PDFs. This OCR function is available in 38 different languages.
caj to pdf converter updf

Part 5: How to Open and View a CAJ File?

CAJ file is an important format for storing research-oriented academic journals within China. Academic scholars, researchers, and other Chinese professors use this format to publish their work. But how can you access and view CAJ files on Windows and Mac devices? Let's find out:

How Do I Open a CAJ File in Windows?

To access and open the CAJ file in Windows, you need to use the CAJViewer tool specially developed by TTKN. Moreover, this tool allows readers, researchers, and even students to access academic articles on different subjects. With features like bookmarking, text search, and note-taking, CAJViewer can make your document management easier and more convenient for all CAJ files.

In fact, users can also modify font sizes, adjust the interface layout, and even shift between different reading modes. Moreover, the articles can be downloaded for offline use, or they can be directly printed using this software.

How Do I Open a CAJ File in macOS?

Although there isn't any reliable tool for opening CAJ files on Mac, you can surely view CAJ files on an online tool, FileProInfo. This free online tool allows you to view open and view CAJ files on Mac devices using web browsers. Moreover, you can also merge, convert, view, compare, and split file metadata.

The platform is straightforward to use, with an easy and friendly interface all around. Within a few seconds, you will be able to preview your CAJ file or perform other operations.

caj to pdf online free


Although the CAJ file format may not be popular worldwide, it's common in China, especially for documents like academic journals or articles. Hence, if you want to use these documents for your task, you need a CAJ to PDF converter. In this article, you discovered a top-class converting tool which is UPDF, and you also learned easy steps to convert CAJ to PDFs.