Convert a paper to PDF
Select or drop a CAJ, KDH, or NH document. Conversion runs in your browser. Check the page preview, then choose Download PDF to save a copy with the original filename and a .pdf extension. Available text and bookmarks are retained. Replacing or closing the document cancels unfinished work.
Check compatibility
CAJ files with PDF page objects and KDH files with PDF content are supported. Image-based HN-A/NH and C8 variants are experimental: compare important equations, tables, and diagrams with the original. Native HN-B/C8 text requiring separate fonts, protected files, TEB variants, damaged documents, and CAA reference files are not supported. Incomplete conversions are not offered for download.
Scanned pages remain images; no OCR is performed. Some characters may use substitute glyphs, and some bookmarks may be adjusted or unavailable. Review the conversion notes before sharing the PDF.
Keep your document local
Your paper is not uploaded and no account is needed. There is no fixed file-size or page-count quota, although large documents can exceed browser resources. Closing the document releases its preview and download. The CAJ Viewer also provides PDF download when you are already reading a paper.