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Image Converter

Convert ITHMB to JPEG

Trying to turn a ITHMB into JPEG? 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 JPEG — an ITHMB file can't be opened by any converter. Here's why, and what actually works.

Why ITHMB to JPEG 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 JPEG. 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 JPEG file?

JPG (JPEG) is a lossy raster format that compresses photographs into small files by discarding detail the eye barely notices — the most widely used photo format on the web and in cameras.

Full name
Joint Photographic Experts Group
Developed by
JPEG Group
Released
1992
Extension
.jpeg
MIME type
image/jpeg
Transparency
No

How to open JPG opens in every browser, image viewer and editor with no special software.

Full JPEG format guide

What you can do instead

Convert ITHMB to PNG

Lossless with transparency — perfect for graphics, logos and screenshots.

ITHMB → PNG

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 JPEG?
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 JPEG instead?
Once you have the real photos (JPG or HEIC), they convert cleanly to PNG, JPG or TIFF — free, no sign-up, no watermark.