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Pricing Blog

JPEG to THM

Looking to convert JPEG to THM? Here's the honest answer — and what works instead.

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

What you can do instead

Convert JPEG to JPG

A small, universal photo format that opens everywhere.

JPEG → JPG

Convert JPEG to PNG

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

JPEG → PNG

Convert JPEG to WEBP

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

JPEG → WEBP
Private — never stored Fast & secure Unlimited & free

Related free tools

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

Don't stop at editing — make it go viral

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

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Format details

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 nameJoint Photographic Experts Group
Developed byJPEG Group
Released1992
Extension.jpeg
MIME typeimage/jpeg
TransparencyNo

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

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

Full nameThumbnail Image
Developed byCamera makers
Released—
Extension.thm
MIME typeimage/jpeg
TransparencyNo

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

Frequently asked questions

Rename it to .jpg, or convert it — it's a JPEG, so any image viewer will then open it.

There's no point: THM is just a camera's JPEG thumbnail. If you need a thumbnail-style image, convert JPEG to JPG.

JPEG converts to JPG, PNG, WEBP, PDF and more — free and instant.

Popular free tools

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