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CAJ to PDF
without installing CAJViewer

CNKI hands you .caj files that almost nothing outside China can open. Drop them in and get normal PDFs — searchable, copyable, printable, and readable on any device. Batch the whole download folder; nothing is uploaded.

Get the Windows app Common questions
Papers never uploaded
Text layer kept
No page limit
CNKI downloads · 3 files added
CAJ urban_rail_transit_2024.caj read
CAJ deep_learning_segmentation.caj read
CAJ thesis_final_draft.caj read
Batch convert
PDF
3 PDF files · names unchanged Text layer kept · generated locally
Converting on this PC Offline No sign-in

Two bad options, usually

Install a Chinese-only reader, or push unpublished research onto a stranger's server.

CAJViewer / online converters the problem

  • CAJViewer is Windows-only, Chinese-language, and often fails to install on newer systems
  • It gives you a .caj to read on that one machine — no shareable PDF for your reference manager
  • Online CAJ converters upload the paper, which is a real issue for embargoed or unpublished work
  • Most free services cap you at a few files per day

FormatMagician local conversion

  • One tool for everything — no separate reader just for CAJ
  • Nothing uploaded. The paper is decoded on your own machine
  • Drop the whole folder and convert dozens of papers in one pass
  • Output is a normal PDF you can search, copy from, cite, and print

Three steps

No account, no internet, no Chinese-language interface to fight with.

1

Install on Windows

Windows 10 or 11, 64-bit. Once installed, conversion keeps working with the network off.

2

Drop in your .caj files

Choose the CAJ scene on the left, then drag files in — or the entire CNKI download folder.

3

Convert to PDF

PDFs are written next to the source files, keeping the original base filename.

Why the text layer is the whole point

The PDF output keeps the text layer, so you can select a paragraph and quote it instead of retyping a screenshot. Ctrl+F works. Reference managers can extract metadata. A print-to-image PDF looks identical at a glance but is a picture — not searchable, not copyable, and blurry when zoomed.

This matters if you are writing about Chinese scholarship: you want the exact wording, and you want to find it again in six months.

Scope, stated plainly: CAJ is an input-only format here — it converts to PDF, and that is the point of the feature. It will not turn a CAJ into Word or EPUB.

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Common questions

Click to expand.

Can I open a CAJ file without CAJViewer?
Yes. Convert it to PDF with this app, then open the PDF in any reader — Edge, Acrobat, Preview, or a tablet.
Is the text still searchable after conversion?
Yes. The output keeps the text layer, so Ctrl+F works and you can copy quotations directly.
Does it convert CAJ to Word?
No. CAJ converts to PDF only. If you need Word, convert to PDF first and then PDF to DOCX with the same app.
How many papers can I convert at once?
There is no count limit. Drag in the whole download folder and they convert in one batch.
Is it free?
The app is free to download from Microsoft Store. CAJ conversion belongs to the full version; details are shown inside the app.

A folder of papers, one conversion

Windows 10 / 11 · 64-bit · no network connection required

Install from Microsoft Store Ask for an offline installer