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THM JPG
File conversion

Convert THM to JPG

Verified by Adam B.· reviewed by FE Editorial ·updated Aug 19, 2026
QUICK ANSWER
Is it possible to convert THM to JPG?
Yes - THM converts to JPG.

Rename the .thm file to .jpg - no software is required because the file is already a JPEG internally. If you prefer a tool, IrfanView or XnView MP open .thm files directly and save as .jpg. THM thumbnails are typically around 160×120 pixels, and that resolution cannot be increased.

Also to JPG: CRW · MRW · QOI

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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Why convert THM to JPG?

Camera makers, camcorders, and GoPros save a companion thumbnail image alongside each video clip using the .thm extension so the device playback menu can show a fast preview. Because the file is internally a standard JPEG, any application that reads .jpg also reads it - only the extension differs.

How to convert THM to JPG

IrfanView FREE

Open the .thm file via File > Open (set filter to All files); go to File > Save As and choose JPG. For multiple files, use File > Batch Conversion/Rename.

XnView MP FREE

Open the .thm file in XnView MP (read as JPEG automatically); go to File > Export and choose JPG. Batch conversion is available via Tools > Batch Convert.

About these formats

.THM Thumbnail Image (camera/camcorder video thumbnail)

A THM file is a small JPEG preview image that cameras, camcorders, and GoPros save automatically next to each video clip (e.g. GX010123.MP4 gets a GX010123.THM). Despite the extension, it…

Open .THM details →
.JPG JPEG Image

A JPG (also .jpeg) is a compressed photo or image in the JPEG format, standardized in 1992. Every operating system opens it natively - double-click and Windows Photos, macOS Preview, or…

Open .JPG details →

Quality & what to watch

  • Renaming the extension causes no re-encoding and zero quality loss; the file bytes are identical to a normal JPEG.
  • THM thumbnails are small preview images, typically around 160×120 pixels; renaming will not increase the resolution.
  • Some cameras embed EXIF metadata in the .thm file; it is preserved when renaming and may be retained or stripped depending on the tool used to re-save.

Frequently asked questions

Do I need special software to open a .thm file?
No - rename it to .jpg and any image viewer opens it immediately.
Will converting THM to JPG reduce quality?
Renaming loses no quality at all. Using a tool to open and re-save performs a JPEG re-encode, which can introduce minor compression artifacts.
Why does my camera save .thm files?
The camera saves a small JPEG thumbnail next to each video clip so its playback menu can show a preview quickly without decoding the full video file.