CAT Converter

Fast CAT conversion for Windows. reaConverter processes large batches reliably, without crashes or timeouts.

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reaConverter
Convert
CAT Files
Online

How to Convert .cat Files in Bulk

1. Install reaConverter

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

2. Select CAT Files

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

3. Start Conversion

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

Convert CAT on your PC

For quick and effortless CAT 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 CAT 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 June 30, 2026
"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
"So simple! I just needed to convert a couple of files to another format, and for such a straightforward task, the online converter worked perfectly — delivering the files I needed in no time. Excellent service!"
Kenneth D. Carter
Kenneth D. Carter
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
"I deal with hundreds of images daily, and reaConverter has been a lifesaver. The Watch Folders feature lets me automate file conversions without lifting a finger. I set up a folder for incoming files and it automatically resizes, renames, and converts them into the formats I need. It's like having a personal assistant!"
Sarah T.
Sarah T.
Graphic Designer
"Exactly what I needed! Simple, fast, and no bloat. I use reaConverter Lite to resize and convert batches of images for documents. The presets make it super easy, and everything works smoothly."
Mark Jones
Mark Jones
Happy User
"reaConverter is pure gold! Rock-solid performance with zero crashes. No internet needed—perfect for travel or low-connectivity work. The ultimate offline alternative to sketchy web converters. Plus, the desktop version keeps sensitive files secure since nothing ever gets uploaded to the cloud."
Malik T. Martin
Malik T. Martin
Satisfied Customer

CAT files: Frequently Asked Questions

What are CAT files?

The CAT file format is associated with Photomatix, a program specialized in merging multiple photographs for creating high-dynamic-range images (HDRI) and the turning them into low-dynamic-range (LDR). The CAT extension is considered rare and can be opened with a limited number of image viewers.

Can reaConverter open CAT files?

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

How do I change CAT to another format?

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

Can I convert CAT online?

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

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

The best way to convert CAT 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 CAT.

How can I automate CAT 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 CAT 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 cat converter.

What else can I do with reaConverter?

Copy metadata (EXIF, IPTC)Convert DICOM filesImage resizerChange format settingsChange DPI

What formats can I convert a CAT 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 CAT conversion

Convert .cat 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 · v8.0.242 · Files never leave your computer
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