Extract text from Video thumbnails (THM)
To convert THM Thumbnails to another format, you need FFmpeg or other Raster Image software.
To convert other file formats to the "Thumbnail Image File" file type, you need software like FFmpeg or a similar tool.
The .THM file extension primarily acts as a Video Thumbnail Image file. These files are automatically generated by digital cameras, smartphones, and action cameras like those from GoPro or Canon. When you record a video (usually an MP4 or AVI), the camera creates a smaller .THM file with the exact same filename. This allows the camera's internal gallery to quickly display a static preview without loading the heavy video file. A secondary, rarer use case is the Sony Ericsson Theme file, which was used to apply custom skins to legacy feature phones. Finally, Thermwood CNC machines use .THM for macro scripts.
You can often open camera thumbnail files using video analysis software like FFmpeg or Windows Media Player, but there is a major catch. Standard operating systems like Windows and macOS do not recognize the .THM extension as an image format by default. This means you cannot simply double-click the file to view it. Users are often forced to manually rename the file extension to JPG just to see the picture. Furthermore, legacy Sony Ericsson themes are essentially obsolete proprietary packages, requiring specific archive tools to extract the internal XML and image assets.
The best conversion targets for camera thumbnails are standard JPG or PNG formats. For mobile themes, extracting the contents to a folder is the only practical workaround.
Because .THM serves multiple disjointed purposes (images, archives, and CNC scripts), standard online converters often fail or apply the wrong processing logic. If our analysis detects it is a standard JPEG or an archive, viewing or conversion may still be straightforward.
Convert.Guru analyzes your THM file, detects the exact format, and lets you read the text inside.
Users also converted LRV, MPG, JPG, AVI, MP4, SCR, MVI, HQ, IMG1, THM 2, HTM, KHM and ZIP files.
If you want to convert THM file to MP4, JPG, MOV, CCF, PNG, MPG, MCF, EXE, MSI, APP, DMG or DEB, you can use FFmpeg or similar software from the "Video Thumbnail Image" category. In the File menu, look for Save As… or Export….
To convert JAR, APP, SCR, IPA, COM, AAB, PS1, DMG, VBS, EXE, XAPK or MSI files to THM, try FFmpeg or another comparable tool in the "Video Thumbnail Image" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our THM converter.