Why convert ITHMB to PNG?
An ITHMB file is Apple's internal thumbnail cache from older iPods, iPhones, and iPads - a binary container packing many small raw preview images without standard headers, unreadable in ordinary image viewers. PNG is lossless, preserving thumbnail pixels exactly without additional quality loss, and is universally supported - a solid choice for archiving recovered thumbnails.
How to convert ITHMB to PNG
iThmb Converter APP
Open the .ithmb file in iThmb Converter, set the output format to PNG, choose a destination folder, and click Export; the program writes one PNG per thumbnail.
File Juicer APP
Drag the .ithmb file onto File Juicer; it carves out the embedded images and saves them to a subfolder - check Preferences to confirm PNG as the output format before running.
GraphicConverter X APP
Open the .ithmb file via File > Open Special > Open RAW Data, specify the pixel dimensions and RGB565 format, then File > Save As > PNG.
About these formats
.ITHMB
Apple iPod/iPhone/iPad Thumbnail Cache
An ITHMB file is a thumbnail cache that older Apple iPods, iPhones, and iPads generated when you synced photos through iTunes. It is not a regular image - it packs dozens of small previews…
Open .ITHMB details →
.PNG
Portable Network Graphics
A PNG (Portable Network Graphics) is a lossless raster image format. Every modern OS, browser, and image app opens PNGs natively - just double-click. The most common questions are not about…
Open .PNG details →Quality & what to watch
- Output is low-resolution: thumbnails were sized for the device's photo-grid UI - typically a few hundred pixels wide - not the original photo resolution.
- Do not rename the
.ithmbfile before extracting: the extractor uses the filename to determine thumbnail dimensions and pixel format. - Be cautious of 'free ITHMB viewer' download sites; many bundle adware - download only from official program websites.
