DJVU to PS Converter

DJVU to PS Conversion Explained

Converting .DJVU to .PS changes a highly compressed scanned document into a PostScript page description file. People perform this conversion to send documents directly to legacy printers or to integrate them into UNIX/Linux print spoolers. You gain direct hardware compatibility with enterprise printers, but you lose the extreme compression and interactive features of the original file.

This conversion is often a bad idea for archiving or sharing. Because .PS files do not support the specialized compression used in .DJVU, the resulting file size will increase drastically. If you need to share a document, converting to .PDF is a much better choice.

Typical Tasks and Users

• System Administrators: Routing scanned manuals to legacy CUPS print servers that require raw PostScript input.
• Academic Researchers: Printing older scientific papers downloaded from archives like ArXiv that are stored in the .DJVU format.
• Linux/UNIX Users: Processing documents through command-line pipelines that rely on Ghostscript or older desktop publishing workflows.

Software & Tool Support

• DjVuLibre: The official open-source implementation for DjVu. It includes the djvups command-line tool, which is specifically designed to convert .DJVU to .PS.
• Ghostscript: The industry-standard interpreter for PostScript. It is required to view, process, or rasterize .PS files after conversion.
• GNOME Evince & KDE Okular: Open-source document viewers that can open .DJVU files and print them to .PS files using system print dialogs.
• Adobe Acrobat Pro: Can process .PS files via Acrobat Distiller, but requires third-party plugins or prior conversion to open .DJVU files.

Pros and Cons of the Conversion

• Pros:

  • Hardware Compatibility: .PS files can be sent directly to PostScript-compatible printers without needing a print driver to render the pages.
  • Pipeline Integration: Easily feeds into legacy command-line tools and automated print workflows.

• Cons:

  • Massive File Size Bloat: A 2MB .DJVU file can easily become a 50MB+ .PS file. DjVu's advanced wavelet compression is lost.
  • Loss of OCR Text: The hidden, searchable text layer in a .DJVU file is usually discarded. The output becomes a series of flat images.
  • No Web Support: Modern web browsers cannot open or display .PS files.

Conversion Difficulties & Why Convert.Guru

The main technical difficulty in this conversion is rendering the .DJVU file structure. DjVu achieves small file sizes by separating pages into a high-resolution foreground layer (text and lines) and a low-resolution background layer (images and paper texture), compressed using the IW44 wavelet algorithm.

To create a .PS file, the conversion engine must decode these layers, composite them into a single flat raster image for each page, and wrap those images in PostScript code. This rasterization process requires significant memory and CPU power.

Convert.Guru is a strong choice for this task because it handles the heavy layer compositing and rasterization on dedicated cloud servers. It prevents your local machine from freezing during memory-intensive decoding and delivers a correctly formatted, print-ready PostScript file without requiring you to install command-line libraries.

DJVU vs. PS: What is the better choice?

Which format should you choose?

Choose .DJVU for storing, archiving, and reading scanned books, manuals, and academic papers. It saves disk space and preserves document structure.

Choose .PS only when you need to send a file directly to a PostScript printer or a legacy print spooler.

Avoid this conversion entirely if you want to share the document with other people or read it on a modern device. Instead, convert .DJVU to .PDF for universal compatibility and better file size management.

Conclusion

Converting djvu to ps makes sense only for specific printing workflows and legacy UNIX environments. The biggest limitation to watch for is the extreme file size bloat and the complete loss of searchable text, as the highly compressed document layers are flattened into basic images. When you absolutely need a PostScript file for hardware compatibility, Convert.Guru provides a fast, accurate, and server-side solution to handle the complex rasterization process without requiring local software installation.