.thumbcache

Windows Thumbnail Cache

Not a file (scheme/atom)

Format facts

MIME type: application/x-thumbcache
Apple UTI: custom
Stock Quick Look: no stock preview
Planned approach (census): not-a-file
Icon hint: generic-icon
Prevalence: rare

Renderer note (from the census)

parse thumbcache header for image count

Gotchas: Windows Explorer cache