Extract text from 3D Movie Maker thumbnails (3TH)
To convert 3TH thumbnails to another format, you need Microsoft 3D Movie Maker or other Game software.
To convert other file formats to the "Asset Cache" file type, you need software like Microsoft 3D Movie Maker or a similar tool.
The .3TH file extension is primarily associated with Microsoft 3D Movie Maker (3DMM), a cult-classic animation program released in 1995. These files function as Thumbnail or Asset Cache containers, storing low-resolution preview images for 3D actors, backgrounds, and props within the software's "McZee" interface.
Because the .3th format is a proprietary legacy relic from the Windows 95 era, it cannot be opened by modern image viewers like Microsoft Photos, Adobe Photoshop, or web browsers. Users typically encounter these files when attempting to mod 3DMM, recover assets from old projects, or when using community-made expansion packs via Virtual 3D Movie Maker (V3DMM). The main limitation is that while the file contains standard bitmap data, it is wrapped in a custom header that renders it unreadable to standard tools.
For most users, the goal is to extract the visual content. We recommend converting .3th files to PNG or JPG for easy viewing, sharing, or archiving. Advanced modders may also need to convert them to raw BMP for re-insertion into the game engine. While Microsoft recently open-sourced the 3DMM code, working with these binary assets still requires specialized community tools or a dedicated conversion workflow.
Convert.Guru analyzes your 3TH file, detects the exact format, and lets you read the text inside.
Users also converted 3MM, 3CN and WLMP files.
If you want to convert 3TH file to [% faq_exts_to %], you can use Microsoft 3D Movie Maker or similar software from the "3D Animation Asset File" category. In the File menu, look for Save As… or Export….
To convert [% faq_exts_from %] files to 3TH, try Microsoft 3D Movie Maker or another comparable tool in the "3D Animation Asset File" 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 3TH converter.