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Convert GIF to THM

Curious about GIF to THM? Here's what THM actually is — and why there's nothing to convert.

There's no real "convert GIF to THM" — a THM file is simply a JPEG thumbnail a camera writes alongside a photo or video.

About THM files

1

THM is a JPEG with a different extension

A .thm file is a small JPEG thumbnail cameras save next to a photo or video so devices can preview it quickly. Its contents are identical to a JPG — only the extension differs.

2

Nothing needs converting to it

Because THM is created automatically by the camera, there's no use case for turning a GIF into one. If you have a THM, just rename or convert it to .jpg to view it.

Format details

What is a GIF file?

GIF is a 256-color raster format that supports simple looping animation — widely used for reactions, stickers and short clips.

Full name
Graphics Interchange Format
Developed by
CompuServe
Released
1987
Extension
.gif
MIME type
image/gif
Transparency
Yes (1-bit)

How to open GIF opens in every browser and image viewer.

Full GIF format guide

What is a THM file?

THM is a small JPEG thumbnail saved alongside camera photos and videos — really a JPEG with a different extension.

Full name
Thumbnail Image
Developed by
Camera makers
Released
—
Extension
.thm
MIME type
image/jpeg
Transparency
No

How to open Rename or convert THM to .jpg to open it anywhere.

Full THM format guide

What you can do instead

Convert GIF to JPG

A small, universal photo format that opens everywhere.

GIF → JPG

Convert GIF to PNG

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

GIF → PNG

Convert GIF to WEBP

A modern format with small files at high quality for the web.

GIF → WEBP

Frequently asked questions

How do I open a THM file?
Rename it to .jpg, or convert it — it's a JPEG, so any image viewer will then open it.
Can I convert GIF to THM?
There's no point: THM is just a camera's JPEG thumbnail. If you need a thumbnail-style image, convert GIF to JPG.
What can I convert my GIF to instead?
GIF converts to JPG, PNG, WEBP, PDF and more — free and instant.