# After using MP3TAG, Windows loses details for FLAC files

**URL:** https://community.mp3tag.de/t/after-using-mp3tag-windows-loses-details-for-flac-files/70241
**Category:** Support
**Created:** [November 27, 2025, 1:42am UTC](https://community.mp3tag.de/t/after-using-mp3tag-windows-loses-details-for-flac-files/70241 "2025-11-27T01:42:52Z")
**Posts on this page:** 1
**Showing post:** 7

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### Author: ![MotleyG](https://community.mp3tag.de/user_avatar/community.mp3tag.de/motleyg/32/440_2.png) [@MotleyG](https://community.mp3tag.de/u/MotleyG)
#### Post date: [November 27, 2025, 9:45pm UTC](https://community.mp3tag.de/t/after-using-mp3tag-windows-loses-details-for-flac-files/70241/7 "2025-11-27T21:45:45Z")

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> [@JimH49](#):
>
> I copied the large PNG file to a 3 MB JPG file and replaced the cover. Windows is still not happy.

You may need to have mp3tag compress the padding space left behind after changing the cover image size.

> [@How does padding and the "Optimize FLAC" feature work?](https://community.mp3tag.de/t/how-does-padding-and-the-optimize-flac-feature-work/65848):
>
> I recently figured out how to fix the issue I was having with a few releases that pertained to Windows not displaying metadata. That lead me down the padding rabbit hole, but I would like this explained from a more technical standpoint. I understand audio a little bit, but I never knew about padding until very recently. I'm very much a novice when it comes to this, and I apologize if my questions seem stupid. What is padding and how does it work? How does padding get added/removed to a fil…

> [@JimH49](#):
>
> It seems that MP3TAG should refuse to add the huge cover file and suggest instead a safe maximum size.

The "safe" size will depend on your own environment and player software. It isn't up to mp3tag to manage that. If it automatically reduced cover art file sizes, other users may be very unhappy with that. It is best left to the user to manage according to their needs. No different than any other tag limitiations.

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