This addon is free you can buy to support development here 😊

Features:

• Upscale Offline locally on your pc
  
• Upscale Texture up to 16x
• Include 6 models by default more available here
  
• Allows For replacing Textures in material with Upscaled Textures
• No dependencies required
• Allows you to compress Upscaled Textures to save memory
• Upscale in separate thread so no Blender Freezing
• Allow for Upscaling image to a custom resolution (Even Downscale)
• Allows you save Upscaled Textures in other formats
• Shows progress of Upscaling in realtime
  

Usage:

Addon's Panel is present in  Image Editor > N-Panel > Texture Upscaler

1. Navigate to the image editor window within Blender.
2. Open the texture you want to upscale.
3. Press 'N' to open the right-side toolbar
4. Navigate to the Texture Upscaler and click 'Texture Upscaler'

This addon only works on vulkan supported CPUs and GPUs .

For more info check documention

Change Logs:

v1.3:

• Updated the UI
• Added option to upscale up to 16x without any new models
• Added ability to compress the upscaled  images
• Added ability to save upscale images in other formats
• Added the ability to upscale image to a custom resolution
• Added new report UI

v1.1 :

• Added support for Linux and MacOS

Previews: