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Image Converter

Convert ITHMB to PNG

Trying to turn a ITHMB into PNG? Here's the honest answer — ITHMB isn't a readable image format — and the steps that get you a real picture.

We can't convert ITHMB to PNG — an ITHMB file can't be opened by any converter. Here's why, and what actually works.

Why ITHMB to PNG isn't possible

1

ITHMB can't be decoded

ITHMB is Apple's private iPod/iPhone thumbnail-cache format. It isn't a standard image file — it's an internal database of many tiny preview images packed together with no public specification, so no image library or converter can decode it.

2

There's no picture to convert

Because nothing can read the ITHMB container, there's no image data a converter can extract and re-save as PNG. Any tool that claims to do it would just fail.

3

Get the original photos instead

The real photos an ITHMB cache was built from live in your photo library or a backup. Export those (they'll be JPG or HEIC), then convert them — that's a conversion that works.

Format details

What is a PNG file?

PNG is a lossless raster format with full transparency. It keeps every pixel intact, making it ideal for logos, icons, screenshots and graphics with sharp edges.

Full name
Portable Network Graphics
Developed by
PNG Development Group
Released
1996
Extension
.png
MIME type
image/png
Transparency
Yes

How to open PNG opens in every browser and image viewer, plus Photoshop, GIMP, Preview and Photos.

Full PNG format guide

What you can do instead

Convert ITHMB to JPG

A small, universal photo format that opens everywhere.

ITHMB → JPG

Convert ITHMB to TIFF

Lossless and uncompressed — ideal for editing, archiving and print.

ITHMB → TIFF

Frequently asked questions

Can any tool convert ITHMB to PNG?
No. ITHMB is a proprietary thumbnail-cache blob that no image library can decode, so there's nothing to convert. Export the original photos and convert those instead.
How do I open an ITHMB file?
ITHMB files aren't meant to be opened directly. Recover the original images from your device's photo library or an iTunes/Finder backup, then work with those.
What can I convert to PNG instead?
Once you have the real photos (JPG or HEIC), they convert cleanly to JPG or TIFF — free, no sign-up, no watermark.