# Can You Delete the Windows Thumbnail Cache Without Losing Photos?

> Clearing the Windows thumbnail cache leaves your photos intact. Check cache sizes with MangoDisk or use Disk Cleanup, and learn what happens to previews afterward.

Seeing “Thumbnails” in a Windows cleanup list can give you pause. Are those your photos? Will checking that box delete them?

**You can clear the thumbnail cache without deleting your original photos or videos.** It stores previews, not the files themselves. Windows generates previews again as needed, so a folder full of pictures may take a little longer to display the first time you open it afterward.

If your goal is to free up space on C:, it helps to see what else is taking up room. MangoDisk lists thumbnail caches alongside other supported system and app caches. You can compare their sizes before choosing what to remove, without hunting through hidden folders.

## A thumbnail is a preview, not the original photo

The small pictures you see while browsing a photo folder are thumbnails. Windows caches them so it can show those previews more quickly next time.

Think of them as an album's index pictures: removing the index doesn't remove the originals. Microsoft explains that when a thumbnail isn't cached, Windows can extract it from the source file. [Microsoft: how the thumbnail cache works](https://learn.microsoft.com/en-us/windows/win32/api/thumbcache/nn-thumbcache-ithumbnailcache)

Clearing this cache won't reduce photo quality or change video content. Deleting pictures directly in File Explorer is a different action, though—it removes the actual files, not just their previews.

## Check cache sizes before you clean

![MangoDisk Deep Cleanup on Windows, showing cache categories, space used, and selected items](https://assets.mangodisk.app/images/screenshots/windows/en/light-01-deep-cleanup.jpg)

Open MangoDisk's [Deep Cleanup](/docs/features/deep-clean) and run a standard scan. Find the thumbnail cache entry, then expand it to check the size and file paths. To clean only that entry, deselect the other items, select the cache, and review the confirmation before proceeding.

**A scan doesn't delete anything.** If the thumbnail cache is small but another app's cache is taking up much more space, you can turn your attention there instead. The useful part is seeing the choices together before committing to a cleanup.

For this entry, MangoDisk matches only `thumbcache_*.db` and `iconcache_*.db` in Windows Explorer's cache directory. These are thumbnail and icon cache databases; the rule doesn't search your photo folders for pictures to delete. [View the cleanup rule](https://github.com/harry0703/MangoDisk/blob/main/src-tauri/crates/mangodisk-core/rules/filesystem/windows/system/system.thumbnail-cache.toml)

If Windows is still using a file and it can't be removed, don't force a permissions change. Try again after restarting, or use the built-in cleanup option below.

## How to clear the thumbnail cache in Windows 11

For this one task, Windows' own Disk Cleanup works too. There's no need to install an app just to clear thumbnails:

1. Search for **Disk Cleanup** in Start and open it.
2. If prompted, select your system drive, usually **C:**.
3. Wait for the scan, then select **Thumbnails** and clear the other checkboxes.
4. Choose **OK → Delete Files**.

These steps use Microsoft's [built-in Disk Cleanup tool](https://support.microsoft.com/en-us/windows/experience/storage-filemanagement/free-up-drive-space-in-windows). If you want to select other categories as well, check [which Windows 11 temporary files are safe to delete](/blog/windows-11-temporary-files-safe-to-delete). Personal files in the Recycle Bin aren't caches.

## Is clearing it worth it?

The cache has a purpose: faster previews. If you have enough free space and previews work normally, you don't need to empty it every day. Browsing your pictures will gradually build it up again.

If C: is nearly full and thumbnails account for very little of the used space, clearing them won't make much difference. MangoDisk's [disk space analyzer](/docs/features/disk-analysis) can show you the larger folders, or you can [find large files on Windows](/blog/find-large-files-windows-11) and start there. Those results include personal files too, not just disposable data; check what you need to keep and read the [cleanup safety guide](/docs/safety) if you're unsure.

[Download MangoDisk](/) to see how much space your caches are using. Free and open source, with no signup or login. You choose what gets cleaned.