I have a large sample of .WI images I need to convert to e.g. JPEGs, but the format now seems defunct.

The mimetype is image/wavelet.

The compression algorithm was developed by Summus, a US company that also now seems defunct.

The last CorelDraw support for the format was under 32-bit Windows (see https://community.coreldraw.com/talk/coreldraw_graphics_suite_x6/f/corel-photo-paint-x6/33558/is-wi-supported-in-x). If I go down the hardware route I need to be able to make calls to a server via e.g. REST.

I think under *nix djvulibre might be able to open the files, but I haven't been able to test this yet. Also IrfanView.

Another option is to re-implement the codec myself.

Does anyone here have any expertise in this area?

Apologies if this is not the right forum - is there a better place?

Thanks for all help!

Here's an input sample http://www.wolfgang-rolke.de/graphics/wavelet.wi

  • 33-bit?! :-) Do you mean NT-based or DOS-based? I think you've asked in the right place; thanks for the question.
    – wizzwizz4
    Commented Jan 21, 2018 at 11:38
  • Shouldn't be too hard to fire up a recent Linux installation in a VM and give the djvu family of tools a shot at it...
    – user
    Commented Jan 21, 2018 at 12:46
  • @wizzwizz4 Good point - need to check which were last CorelDraw versions to support WI
    – jtlz2
    Commented Jan 21, 2018 at 15:12
  • @MichaelKjörling A next step sounds like me providing a sample - how hopeful are you? :/
    – jtlz2
    Commented Jan 21, 2018 at 15:13
  • 1
    At least ddjvu can't decode it: ddjvu: Cannot decode document.
    – kolen
    Commented Jan 25, 2018 at 18:39

1 Answer 1


There's no need to go down the hardware route to run 32-bit apps. 32-bit apps run on 64-bit Windows.

However, not all old apps run on newest operating systems despite the bitness. I own for example CorelDraw X3, which does not run on Windows 10. But I run it on a 32-bit Windows 7 Client OS on virtual machine regularly (on a 64-bit Windows 10 host). That setup is also useful for running 16-bit apps on a 64-bit windows Machine, which is not supported directly.

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