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ITHMB to WEBM

Trying to open a ITHMB as WEBM? Here's the honest answer — and how to get a real image.

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

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

Why ITHMB to WEBM 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 WEBM. 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.

Private — never stored or used for AI training Fast & secureUnlimited & free

Related free tools

Image ConverterFree toolPNG to JPGFree toolHEIC to JPGFree toolWEBP to PNGFree tool
AI Effects

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Turn your file into a share-worthy AI Effect — one tap, no prompts.

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Format details

WEBM is an open, royalty-free video format built for the web — small files at good quality, widely supported in browsers.

Full nameWebM
Developed byGoogle
Released2010
Extension.webm
MIME typevideo/webm
TransparencyNo

WEBM plays in modern browsers and many desktop players.

Frequently asked questions

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.

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.

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

Popular free tools

Image ConverterPNG to JPGHEIC to JPGWEBP to PNGResize ImageCrop ImagePNG to WEBPImage Compressor