CDU Converter

Got hundreds of CDU files to convert? reaConverter handles entire folders in minutes, not hours.

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reaConverter
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CDU Files
Online

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 November 26, 2025
"Creating marketing materials for various platforms requires multiple file versions from single sources. reaConverter's workflow automation lets us generate PNG, JPEG, and SVG variants from AI and PSD files simultaneously. The color profile management ensures brand consistency across all outputs, and the processing speed allows for last-minute changes without delaying deadlines."
Rebecca Turner
Rebecca Turner
Marketing Agency CEO
"Converts files in seconds! Finally a tool that's both fast and simple to use."
Wei Chen
Wei Chen
Happy User
"I firmly believe working with JPEG — the universal format supported by all devices and apps—is the wisest choice. reaConverter handles these conversions flawlessly."
Ava Thomas
Ava Thomas
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
"Before reaConverter, I was the ‘File Conversion Guy’ at work — a title I never asked for and definitely didn’t want. Then I found the Watch Folders feature, and suddenly I was free! Now, files convert themselves while I sip coffee and pretend I'm still working hard. My coworkers think I'm a wizard. Thanks reaConverter, for saving my sanity and boosting my fake productivity!"
Ben H.
Ben H.
Overwhelmed Office Hero
"reaConverter's automation tools have completely changed how I manage my projects. I often work with large batches of illustrations and used to spend hours converting and organizing them. Now, with Watch Folders, I just set the rules once and everything is handled automatically, exactly how I need it. This is pro-level automation made simple."
Chloe M.
Chloe M.
Freelance Illustrator

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  dcx  dds  dgn  dis  drw  dwf  dwg  dxf  emf  epi  eps  fax  fits  flif  gbr  gif  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  svg  svgz  tga  tif  tiff  webp  webpll  wmf  wmz  wpg  wrl  xbm  xpm 

Discover more

Explore our efficient CDU file converter that saves you time and effort by converting multiple .cdu files into different formats.
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