Extract text from JavaScript modules (JSM)
To convert JSM modules to another format, you need Mozilla Firefox or other Developer software.
To convert other file formats to the "Mozilla JavaScript Module" file type, you need software like Mozilla Firefox or a similar tool.
.JSM files are predominantly Mozilla JavaScript Modules used by Mozilla Firefox to share JavaScript code across different scopes and extensions. Alternatively, the .JSM extension is used for legacy JASC Image Commander and Image Robot scripts, or Tekla Structures job-sharing 3D model files. You can open Mozilla .JSM files with standard text editors like Visual Studio Code. JASC files require legacy PaintShop Pro software, while Tekla files require Tekla Structures.
The primary disadvantage of Mozilla .JSM files is their proprietary nature within the older Mozilla add-on ecosystem. Web browsers and standard Node.js environments do not natively execute .JSM files without specific loaders. Mozilla has actively deprecated them. For JASC and Tekla files, the formats are closed and proprietary. Users rarely have access to the expensive or discontinued software required to open them.
To modernize Mozilla .JSM files, you should convert or rename them to standard JS or MJS files. Be aware that you will need to manually update the internal code syntax from EXPORTED_SYMBOLS to standard JavaScript export statements.
Legacy proprietary formats like JASC scripts or Tekla models are notoriously difficult to open or convert. Often, only the original software can properly read or export the data, causing standard online converters to fail. We can inspect the file, extract plain text, or detect underlying compression. For instance, Tekla .JSM files use GZIP compression; if our analysis detects this embedded format, extraction and viewing may still be possible.
Convert.Guru analyzes your JSM file, detects the exact format, and lets you read the text inside.
Users also converted MAFF, XUL and MOZLZ4 files.
If you want to convert JSM file to , you can use Mozilla Firefox or similar software from the "JavaScript code module storage" category. In the File menu, look for Save As… or Export….
To convert files to JSM, try Mozilla Firefox or another comparable tool in the "JavaScript code module storage" 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 JSM converter.