Click the "Select File" button above, and choose your THMX file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert THMX to another file type
To convert THMX themes to another format, you need Microsoft PowerPoint or other Settings software.
Convert a file to THMX
To convert other file formats to the "Office Theme File" file type, you need software like Microsoft PowerPoint or a similar tool.
About THMX files
A .THMX file primarily functions as a Microsoft Office Theme package. Introduced in Office 2007, it stores shared formatting settings like color palettes, fonts, and visual effects across Microsoft PowerPoint, Word, and Excel. A rare secondary use for .THMX files is as an XML-based Window thermal analysis file for the LBNL THERM software. The .THMX format presents several usability challenges. It is not a standalone document, meaning users cannot double-click to view a presentation or document directly. It requires a paid desktop software subscription like Microsoft 365 to apply effectively. Users often receive a .THMX file by mistake when expecting a standard .PPTX file, causing confusion when the file fails to open in web browsers, mobile document viewers, or alternative presentation software. Standard online document converters usually fail to process .THMX files because they are technically ZIP archives containing intricate XML formatting directories rather than flat document data. Because this is a proprietary, specialized format, only the original Microsoft software can properly read or export the visual theme data to a standard presentation file. Our platform can inspect the underlying ZIP container to expose the internal XML code and image assets.
Convert.Guru analyzes your THMX file, detects the exact format, and lets you read the text inside.
If you want to convert THMX file to JSON, XML, PPT, PPTX, INI, CFG, CONF, CONFIG, YAML, YML, TOML or ENV, you can use Microsoft PowerPoint or similar software from the "Document Theme Storage" category. In the File menu, look for Save As… or Export….
To convert ZSHRC, CONF, RCFILE, GITCONFIG, RC, PLIST, BASHRC, CONFIG, PROFILE, INI, PREFS or CFG files to THMX, try Microsoft PowerPoint or another comparable tool in the "Document Theme Storage" category.
The THMX Converter Story
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 THMX converter.