JJ Converter

Convert JavaCC grammar files (JJ) online for free


Drop or upload your .JJ file
✈

How to convert your JJ file

  1. Click the "Select File" button above, and choose your JJ file.
  2. You'll see a preview.
  3. Click the "Convert file to..." button to save your file in the format you want.

Convert JJ to another file type

The converter easily converts your JJ grammar files to various formats - free and online. No Java Compiler Compiler or other Developer software needed.

  • JJ to TARGA
  • JJ to MIFF
  • JJ to CT
  • JJ to CH
  • JJ to 85I
  • JJ to PI2
  • JJ to PS3
  • JJ to TIM
  • JJ to PI6
  • JJ to PDF
  • JJ to SCT
  • JJ to RAW

Convert a file to JJ

To convert other file formats to the "Parser Grammar File" file type, you need software like Java Compiler Compiler or a similar tool.


About JJ files

A .JJ file primarily functions as a parser grammar definition file for Java Compiler Compiler (JavaCC), an open-source parser generator. These files contain lexical specifications and grammar rules used to generate Java code. Additionally, some .JJ files are disguised JPG images created by the JJ Race application. The main disadvantage of JavaCC .JJ files is their lack of native support; without specialized IDE plugins for Eclipse or IntelliJ IDEA, they open as unformatted text, making complex code hard to read and debug. Furthermore, JJ Race image files completely break standard image viewers because the operating system does not recognize the .JJ extension as an image format. For code sharing and archiving, convert JavaCC .JJ files to TXT or compile them to JAVA. For JJ Race images, convert them to standard JPG, PNG, or WEBP for universal web and device compatibility. Drag and drop your file to analyze and convert it - free, online, and without installing software.

Use Convert.Guru to open and convert your JJ file.

Users also converted JFIF, PP, BMS and ERL files.


FAQ

If you want to convert JJ file to , you can use Java Compiler Compiler or similar software from the "Parser Grammar or Renamed Image" category. In the File menu, look for Save As… or Export….

To convert files to JJ, try Java Compiler Compiler or another comparable tool in the "Parser Grammar or Renamed Image" category.



The JJ 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 JJ converter.