CDU Converter

Got hundreds of CDU files to convert? reaConverter handles entire folders in minutes rather than hours.

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CDU Files
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How to Convert .cdu Files in Bulk

1. Install reaConverter

Download reliable CDU conversion software to convert multiple .cdu files and folders in one go.
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Install reaConverter

2. Select CDU Files

Select CDUs from a folder or drag and drop them into reaConverter, then choose the desired output format.
reaConverter - Load CDU files

3. Start Conversion

Click Convert to start the bulk conversion of all selected CDU files. The process will begin right away.
reaConverter - Start CDU conversion

Convert CDU on your PC

For quick and effortless CDU file handling on your PC, reaConverter offers powerful conversion tools with batch processing. Best of all, it works entirely offline — ensuring your sensitive data never leaves your computer.

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Do more with your files

Converting CDU files for use in a larger project? reaConverter offers many ways to process files, so you can customize them according to your requirements.

Our range of editing options includes auto-processing options such as auto-rotate, auto-crop, watermarking and more. Change Color Space, copy Metadata, set DPI, manage ICC Profile, control Bit Depth.

Conversion features
Image editing

User Reviews

Average User Rating:
Last updated on May 28, 2026
"Rare software that actually does it all! Converts anything, beautiful interface, and never lets me down. A must-have!"
Henry R.
Henry R.
Happy User
"I was skeptical at first, but reaConverter exceeded my expectations. The interface is intuitive, and the advanced settings let me tweak outputs perfectly. Plus, the customer support is fantastic!"
Sarah Lane
Sarah Lane
Satisfied Customer
"Tried a few image tools before, but this one is by far the easiest. Drag, drop, convert — done in seconds. It saved me a ton of time when organizing my image folders."
Lisa K.
Lisa K.
Happy User
"Our volunteer team uses reaConverter to prepare images for fundraising campaigns. The learning curve was minimal, and the results are professional-grade. The customer support team even helped us customize a workflow — fantastic service!"
Jason P. Bailey
Jason P. Bailey
Non-Profit Coordinator
"The step-by-step video makes conversion foolproof. I'd recommend this to my grandma - it's that well-explained!"
DeShawn M. Thompson
DeShawn M. Thompson
Happy User
"After 200+ conversions on my budget laptop (i3-1115G4/4GB RAM/Win11), reaConverter outperforms heavyweight tools. Zero crashes, low CPU usage during batch processing, and no internet dependency - exactly what professionals need."
Walter Morgan
Walter Morgan
Satisfied Customer

CDU files: Frequently Asked Questions

What are CDU files?

Images that are created or edited using CDU Paint, a bitmap manipulation software, are often associated with the CDU extension.

Can reaConverter open CDU files?

reaConverter fully supports the CDU file format – open, edit, and export CDU files to any other popular file format with ease.

How do I change CDU to another format?

reaConverter is a user-friendly tool for converting CDU files. Once installed on your computer, it allows you to convert all your .cdu files at once with just a few clicks. You can even convert cdu images directly from Windows Explorer using the right-click menu — fast and convenient.

Can I convert CDU online?

If you only want to convert a few CDU files, you are welcome to try our free online CDU converter.

How can I turn CDU files on my computer to another format?

The best way to convert CDU files on your PC is to get a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from CDU.

How can I automate CDU files conversion?

reaConverter supports all the essential automation features, such as right-click сonversion and Watch Folders, for the most efficient automated file conversion in any software of its kind.

Can I convert CDU files using scripts or the command-line interface?

reaConverter provides full access to all its features from the Windows command-line shell, including the command-line cdu converter.

What else can I do with reaConverter?

Convert Gerber imagesCrop imagesCopy EXIF dataChange file creation dateConvert GIS files

What formats can I convert a CDU file to?
ai  apng  avif  bmp  bpg  cal  cg4  cgm  cin  cit  dcm  dcx  dds  dgn  dis  drw  dwf  dwg  dxf  emf  epi  eps  fax  fits  flif  gbr  gif  glb  gltf  hpg  hru  ico  iff  iges  igs  jp2  jpeg  jpg  jxl  jxr  mif  mtv  pcl  pct  pcx  pdf  pgm  pic  plt  png  ppm  prc  ps  psd  qoi  qrt  rad  rla  sgi  shp  step  stl  stp  svg  svgz  tga  tif  tiff  u3d  webp  webpll  wmf  wmz  wpg  wrl  x3d  xbm  xpm 

Beyond CDU conversion

Convert .cdu files in batches of any size, with editing and processing applied along the way. The same tool also handles 700+ other formats, including CAD, medical imaging, and GIS.
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Free trial · Windows 10/11 · 64-bit · v8.0.240 · Files never leave your computer
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