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- [Online .EXR and .HDR Image File Viewer](https://viewer.openhdr.org/) - OpenHDR Viewer. Has a very well implemented tone mapper, auto-exposure, and HDR histogram.
- [RenderDoc](https://renderdoc.org/) - Reliable viewer for LDR/HDR .DDS files in BC1-7 formats. Open the .PNG/.EXR/.DDS file, then select Window->Texture Viewer. Supports mipmaps, texture arrays, cubemaps, basic exposure controls.
- [Paint.NET](https://www.getpaint.net/) - Windows app: built-in [.DDS file loading](https://github.com/0xC0000054/pdn-ddsfiletype-plus), supports BC1-7 and [cubemaps](https://github.com/0xC0000054/pdn-ddsfiletype-plus/wiki/Cube-Maps)
-- [dds-ktx](https://github.com/septag/dds-ktx): Simple .DDS/.KTX viewer with mipmap support. (Note: Crashes on compressed textures not divisible by 4 texels on each dimension.)
+- [dds-ktx](https://github.com/septag/dds-ktx): Simple .DDS/.KTX viewer with mipmap support. (Note: Crashes on compressed textures not divisible by 4 texels on each dimension, which is a [Direct3D specific limitation](https://learn.microsoft.com/en-us/windows/win32/direct3d10/d3d10-graphics-programming-guide-resources-block-compression).)
- [AMD Compressonator](https://gpuopen.com/compressonator/) - .DDS viewer, can view .KTX files in some formats.
- [PVRTexTool](https://www.imgtec.com/developers/powervr-sdk-tools/pvrtextool/) - Can view .ASTC and .KTX files in some formats that AMD Compressonator won't view. (Note: .DDS viewer seems busted for BC1, doesn't support BC7 at all.)
- [Microsoft's DirectXTex](https://github.com/microsoft/DirectXTex) - Samples contain a basic .DDS viewer. (Note: May still have issues loading .DDS files with texture dimensions that aren't divisible by 4 texels.)
