raster format

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 a THM file

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

What THM files are used for

Photos & web images

Share, post and embed pictures across sites and apps.

Editing & design

Work with the format in editors like Photoshop and GIMP.

Storage & archiving

Keep memories and assets in a widely-readable form.

Strengths & limitations

✔ Strengths✖ Limitations
Purpose-built for its nicheNo transparency support

Tools for this format

Convert, compress and edit — free, in your browser.

Need more than a conversion?

Remove the background from THM images, upscale to 4K, or generate new visuals with SharkFoto AI.

Frequently asked questions

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

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

THM is optimised for its specific use rather than strictly lossless storage.

Use SharkFoto's free tools — upload your THM file and convert it to a more convenient format in seconds. It's free, processed securely and never stored.

No — THM doesn't store transparency; convert to PNG or WEBP if you need it.