Update: Unfortunately, thumbsdb.tools has been retired, to extract images from thumbs.db files, we recommend https://thumbsviewer.github.io/
iconcache and thumbcache db files are small database files created by Windows in order for users to quickly preview files and folders stored on their computer.
These files are essentially filled with tiny preview-versions of all the files in the folder.
It may be impossible to delete these files because windows will automatically recreate them.
In order to view or extract data from thumbcache / iconcache db files, you can use the tool at https://thumbsdb.tools/thumbcache-viewer.php
This tool is compatible with extracting the following db files:
iconcache_2560.db
iconcache_1600.db
iconcache_1280.db
iconcache_1028.db
iconcache_1024.db
iconcache_768.db
iconcache_256.db
iconcache_96.db
iconcache_48.db
iconcache_32.db
iconcache_16.db
iconcache_wide.db
iconcache_wide_alternate.db
iconcache_custom_stream.db
iconcache_idx.db
iconcache_s.db
iconcache_sr.db
iconcache_exif.db
thumbcache_2560.db
thumbcache_1600.db
thumbcache_1280.db
thumbcache_1028.db
thumbcache_1024.db
thumbcache_768.db
thumbcache_256.db
thumbcache_96.db
thumbcache_48.db
thumbcache_32.db
thumbcache_16.db
thumbcache_wide.db
thumbcache_wide_alternate.db
thumbcache_custom_stream.db
thumbcache_idx.db
thumbcache_s.db
thumbcache_sr.db
thumbcache_exif.db