JMS Converter

Extract text from Hot Potatoes projects (JMS)


Drop or upload your .JMS file
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How to extract text from your JMS file

  1. Click the "Select File" button above, and choose your JMS file.
  2. You’ll see a preview, if available.
  3. Click the "Convert file to..." button to extract text information.

Convert JMS to another file type

To convert JMS projects to another format, you need MAME or other Game software.

Convert a file to JMS

To convert other file formats to the "Arcade Game Data File" file type, you need software like MAME or a similar tool.


About JMS files

The .jms file extension primarily represents two entirely different formats: an arcade game data file used in SNK Neo Geo games and a project file created by the Hot Potatoes educational suite. In the context of retro gaming, a .jms file contains highly proprietary graphics or audio data used by emulators like MAME. These files lack standard documentation and cannot be opened natively by modern operating systems. Users often want to convert them to extract sprites as PNG or game soundtracks as MP3, but standard image or audio converters will fail because the data is heavily compressed and interleaved specifically for arcade hardware. Alternatively, a .jms file acts as a 'Masher Project' file used by Half-Baked Software's Hot Potatoes suite. It serves as an exercise unit project file that compiles various quizzes into one cohesive unit. Built on an underlying XML structure, it is strictly meant to be processed by the Hot Potatoes software to output HTM or HTML web pages. Sharing a .jms file directly is problematic since the recipient needs the exact software installed to read the exercise logic. Both forms of .jms files are difficult to open or convert directly because they are either raw arcade dumps or proprietary XML wrappers. Most standard online converters fail to process them. However, just drag and drop your file onto convert.guru to identify the format, view its structure, and see what it is. If our analysis detects the underlying XML from Hot Potatoes or readable headers from Neo Geo data, viewing or conversion may still be possible.

Convert.Guru analyzes your JMS file, detects the exact format, and lets you read the text inside.

Users also converted JPEG and P2B files.


FAQ

If you want to convert JMS file to TMP, TEMP, CACHE, LOG, BAK, OLD, NEW, PART, DOWNLOAD, CRDOWNLOAD, LOCK or PID, you can use MAME or similar software from the "Game Data or Quiz Project" category. In the File menu, look for Save As… or Export….

To convert DEVICE, CACHE, SOCK, SYMLINK, PID, MOUNT, FIFO, LOG, PIPE, TMP, JUNCTION or TEMP files to JMS, try MAME or another comparable tool in the "Game Data or Quiz Project" category.



The JMS 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 JMS converter.