Bug 504060

Summary: [Wishlist] Add export option to limit thumbnail.png size in .ora files
Product: [Applications] krita Reporter: Thomas Berger <thomas.berger.lpz>
Component: File formatsAssignee: Krita Bugs <krita-bugs-null>
Status: REPORTED ---    
Severity: wishlist CC: dimula73
Priority: NOR    
Version First Reported In: 5.2.9   
Target Milestone: ---   
Platform: Microsoft Windows   
OS: All   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Thomas Berger 2025-05-11 15:54:23 UTC 
Currently, Krita saves a full-size thumbnail.png inside the /Thumbnails/ folder of every .ora file. In many cases, this thumbnail is as large as the canvas itself (e.g. 2204×1240), which unnecessarily increases the file size—sometimes by several megabytes.

This is problematic when managing large numbers of .ora files, sharing them online, or working with limited storage. A smaller thumbnail would still provide a good file preview in operating systems like Windows or KDE without bloating the file.

Feature request:
- Add an option to limit the resolution (width/height) of thumbnail.png when exporting .ora files
- For example: max width 256px (automatically scaled down from canvas)
- Optional: allow setting this limit in the export dialog or application settings

This would help keep .ora files compact and improve usability for artists and developers alike.

Kind regards,  
Thomas