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KOA Image Conversion: Batch Convert, Resize & Organize

Contenta Converter PREMIUM lets you open, convert, and batch process KOA files into modern formats like JPG, PNG, TIFF, PDF, and more.

Download the free trial: every file converts, keep 10 clean

Contenta Converter results screen showing 32 converted photos and a before and after preview
The results screen of Contenta Converter: 32 photos converted in 47 seconds, with a before and after preview.
  1. Add your KOA filesDrop in single files or a whole folder.
  2. Pick output formatJPG, PNG, TIFF, PDF and more.
  3. Click ConvertEvery file converted in one pass.

The same photo, five outputs

Photo of a stage set with a bed, a small table and a checked sofaDSC_0001.NEF · 3900×2613
  • PNG.png1.9 s
    16.1 MB
  • AVIF.avif2.2 s
    2.02 MB
  • JPG.jpg1.7 s
    1.69 MB
  • WebP.webp1.7 s
    1.32 MB
  • JPEG XL.jxl1.7 s
    1.12 MB
One Nikon D60 RAW file converted to five formats, at quality 90 where the format has a quality setting. PNG is lossless, so it is the largest. Seconds are the median of three runs. Measured with the Contenta Converter 9.0.35 command line on an AMD Ryzen 9 3900X, 2026-09-30.

Optimize file size, keep important metadata, and prepare images for web, print, or long-term archiving in just a few clicks.

✓ 100,000+ users worldwide · 100+ formats supported · Free trial, no time limit

Format

KOA

Company

Commodore
Drawbacks No compression in the base format — 640×480 in 256 colors is about 300 KB. Superseded by PNG (1996) and modern formats for every practical use.

Ready to convert your KOA files? Download the free trial.

Download the free trial: every file converts, keep 10 clean

Users reviews:

"I have been using Contenta Converter for years and it has saved me countless hours of work. Highly recommended!"
"Simple, fast, and does exactly what it promises. The batch processing is incredibly efficient."
"Best image converter I have found. The RAW support and metadata handling are top-notch."
Trusted by 100,000+ users worldwide
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KOA image organization

How to open KOA? How to process KOA? How to shrink KOA? How to reduce KOA? How to rename KOA automatically? How to organize KOA in sub-folders? How to recompress KOA? How to create a PDF photo album from KOA?

KOA image color processing

How to convert KOA to black and white? How to convert KOA to sepia? How to adjust the brightness of KOA? How to adjust the contrast of KOA? How to adjust the gamma of KOA? How to invert the colors of KOA? How to boost colors of KOA? How to boost the contrast of KOA?

KOA image processing

How to add a watermark to KOA? How to create animated GIF slideshows from KOA? How to create pencil/ink drawings from KOA? How to sharpen KOA? How to blur KOA? How to refocus KOA? How to denoise hot pixels from KOA? How to crop KOA? How to rotate KOA? How to flip KOA?

KOA image annotation

How to change the DPI resolution of KOA? How to modify the IPTC/XMP dates of KOA? How to modify the IPTC/XMP description of KOA? How to modify the IPTC/XMP location of KOA? How to modify the IPTC/XMP legal information of KOA? How to edit the IPTC/XMP workflow of KOA? How to edit the IPTC/XMP copyright of KOA?

Frequently Asked Questions about KOA

What is a KOA image file?

A KOA file is a type of image format used in various tools and workflows. With Contenta Converter PREMIUM you can convert KOA files to more common formats like JPG, PNG, or PDF without losing control over quality.

How do I convert KOA images to JPG?

Install Contenta Converter PREMIUM, add your KOA files to the input list, choose JPG as the output format, and click Convert. The software will process all selected files in a single batch.

Can I batch-process many KOA images at once?

Yes. Contenta Converter PREMIUM is built for batch processing and can handle hundreds or thousands of KOA images in one operation, using all available CPU cores.

When should I convert KOA images to another format?

Convert KOA images when you need better compatibility with web browsers, design tools, or printing services. Exporting to formats like JPG, PNG, or TIFF from Contenta Converter PREMIUM makes sharing and archiving much easier.

Need more than KOA conversion? Browse supported cameras that produce KOA files below, or:

See all 100+ formats and features →