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Convert WEBP to THM

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

There's no real "convert WEBP 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 WEBP into one. If you have a THM, just rename or convert it to .jpg to view it.

Format details

What is a WEBP file?

WEBP is a modern Google format using lossy and lossless compression to make images ~25–35% smaller than JPG or PNG at similar quality, with transparency and animation support.

Full name
Web Picture format
Developed by
Google
Released
2010
Extension
.webp
MIME type
image/webp
Transparency
Yes

How to open WEBP opens in all modern browsers and recent Photoshop, GIMP and image viewers.

Full WEBP 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 WEBP to JPG

A small, universal photo format that opens everywhere.

WEBP → JPG

Convert WEBP to PNG

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

WEBP → PNG

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 WEBP to THM?
There's no point: THM is just a camera's JPEG thumbnail. If you need a thumbnail-style image, convert WEBP to JPG.
What can I convert my WEBP to instead?
WEBP converts to JPG, PNG, WEBP, PDF and more — free and instant.