.THM File Extension

File Type 1

Sony Ericsson Theme File

Developer Sony Ericsson
Popularity
3.5  |  117 Votes
Category Misc Files
Format N/A

What is a THM file?

A THM file is a theme file used by Sony Ericsson mobile phones. It stores settings used to customize the user interface of the cell phone and includes custom window and text colors, icons, wallpaper, and other images. THM files can be created and edited using the free Themes Creator from Sony Ericsson, which is no longer developed.

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Programs that open or reference THM files

Windows
Sony Ericsson Themes Creator
Mac
Sony Ericsson Themes Creator
Updated August 6, 2020
File Type 2

Video Thumbnail File

Developer N/A
Popularity
3.5  |  70 Votes
Category Raster Image Files
Format Binary

What is a THM file?

A THM file is a thumbnail image generated by digital camcorders and software programs when saving a video clip. It contains a small image from the video clip's first frame and is displayed to help a user identify a clip when visually browsing through a collection of video clips. THM files often are saved in the JPEG format.

More Information

When you are capturing video with a digital camcorder or camera, the device creates a thumbnail of the video and saves it to its memory card or internal storage. Then, when you import video from a camcorder or camera, the software you are using to transfer the video also transfers the associated THM files.

Each THM file transferred from a device to a computer shares the same filename as its associated video clip. For example, a THM file for clip001.avi is created as clip001.thm.

How to open a THM file

You will likely never need to open a THM file since the software program you use to browse video clips displays the thumbnail image next to the video clip.

However, if you encounter a THM file and need to open it individually, you can attempt to open it directly with an image viewer, such as Microsoft Photos, Microsoft Paint, or Apple Preview. If that does not work, you can change the .thm file extension to .jpg and attempt again to open it with an image viewer.

NOTE: If the THM file is not saved in JPEG format, you will likely be unable to open it with an image editor.

How to convert a THM file

If the THM file is saved in JPEG format, you can convert it to other formats with many image editors, including Microsoft Paint, Adobe Photoshop, and Apple Preview.

For example, Paint can convert THM files saved in JPEG format to the following formats:

  • .JPG - JPEG Image
  • .JFIF - JPEG File Interchange Format
  • .PNG - Portable Network Graphic
  • .GIF - Graphical Interchange Format
  • .TIF - Tagged Image File Format
  • .BMP - Bitmap Image
  • .HEIC - High Efficiency Image Format
  • .DIB - Device Independent Bitmap

Programs that open or reference THM files

Mac
Included with OS
Linux
Updated June 22, 2022
File Type 3

Thermwood Macro File

Developer Thermwood
Popularity
3.2  |  23 Votes
Category Executable Files
Format N/A

What is a THM file?

Macro file used by Thermwood CNC Routers; contains router machining instructions that automate router processes; a list of CNC events are also saved in a file named "hist.thm."

Programs that open THM files

Windows
Thermwood Mastercam
Updated February 18, 2009
File Type 4

Thumbnail Image File

Developer N/A
Popularity
3.0  |  23 Votes
Category Raster Image Files
Format Binary

What is a THM file?

Small, icon-sized image that represents a larger image; commonly used on the Web and in clip art galleries; may be created by various photo or video editing programs; also produced by some digital cameras as small sample images of photos captured by the camera.

Programs that open THM files

Windows
Mac
Included with OS
Updated December 7, 2012

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