Open THM files

  • Full name
    Sony Ericsson Mobile Phone Theme Format
  • Developer
  • Popularity
Have you encountered a problem with a THM file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a THM file here. In the further part of this page we have added a list of programs that should open your THM file. It is enough you choose a proper application for your operating system, download and install it.

What is THM file?

THM files are used by various programs for so-called thumbnail files - thumbnails are small images (thumbnail groups) that represent large images or video files in a summary view. These files are automatically created by various photo and video programs when browsing a picture or video folder for the first time, in order to be able to display or transfer the overview more quickly later (eg in online picture management programs).

More info

Thumbnail files are usually compressed (JPEG) to save disk space and increase processing speed. However, most programs use their own containers, so the THM files can only be opened by the program with which they were created. However, most of them can be viewed in any image viewer, often the change of the file extension to jpg helps.

THM files can also represent videos, in which case the THM file is a copy of one of the first frames (video image). Each modern operating system also uses thumbnails for the thumbnails of picture folders. For example, Windows uses only one file per folder, the thumbs.Db.

Often THM files are also stored by video cameras on memory cards, in order to ensure a fast image preview for pictures or videos. So different cameras from Sony, Canon and Olympus use the extension thm. Depending on the transfer software but you get the THM file not to see.

Programs which can open a THM file

How to open file with THM extension?

In order to open a file with THM extension one of the following programs must be installed on user’s system. If a problem with opening THM file occurred, it is highly possible that none of the listed programs is present on user’s system. Even if one or more said programs are installed, there may be issues related with given programs. In order to solve a problem with THM files, follow the instructions below.
Install Apple Preview or other program from the list

Most often resolving problems with opening THM files is very simple. Just install an appropriate program that supports such files. All of the listed programs support THM files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of THM files or offer file conversion options, but may not be capable of editing such files.

Set Apple Preview as the default program for opening THM files

It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate THM files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the Apple Preview applications is not on the list, select "Browse" option in order to manually locate the directory where Apple Preview has been installed.


Check the section that lists most common problems with THM files

Sometimes problems with opening THM files may not lie with the application itself, but can arise due to other causes, such as:

  • File data is corrupted
  • THM files has been not been completely download from the internet (only a part of the data has been downloaded)
  • Currently used user account hasn’t been granted necessary privileges to open THM files (should that be the case, please contact your system administrator or IT specialist)
  • THM file was being copied from a corrupted storage device and is incomplete or data is corrupted. (Copying files from unknown or untrusted sources should be conducted with great care as such files may contain malicious software, which can damage your system)

Similar extensions