Free, private, browser-based
.ithmb & .ipm
file decoder —
open source
Drop your .ithmb files onto this page and every thumbnail in the container is decoded and displayed instantly.
The conversion runs locally in your browser via WebAssembly — nothing is uploaded, nothing to install.
The decoder runs in any modern browser, so it works the same on Windows, macOS, Linux, and mobile. Windows desktop users can also use the ImageGlass plugin.
ITHMB (iThumbnail) is the thumbnail cache format Apple's classic iPods used for photo previews.
The format was never publicly documented and varies across devices and firmware versions, which is why regular image viewers can't open it.