BPJ Converter

Extract text from Boxsim projects (BPJ)

Select File
Drop or upload your .BPJ file

Online File Converter

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How to extract text from your BPJ file

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

Convert BPJ to another file type

To convert BPJ projects to another format, you need Boxsim or other Cad software.

Convert a file to BPJ

To convert other file formats to the "Audio Engineering Project" file type, you need software like Boxsim or a similar tool.

About BPJ files

A .bpj file is a specialized simulation project created by Boxsim, a powerful freeware tool developed by Visaton for designing HiFi loudspeakers. These files store the complete "DNA" of a speaker build: driver parameters (Thiele/Small), enclosure geometry (volume, baffle dimensions), and complex crossover network schematics.

Common Friction Points: Users frequently mistake .bpj files for audio files, but they contain data, not sound. You cannot play them in VLC Media Player. Furthermore, the format is proprietary and Windows-exclusive. Opening a .bpj file on macOS, Linux, or a mobile device is impossible without emulation software.

Best Conversion Targets:

For Sharing/Archiving: Open the file in Boxsim and use "Print to File" to create a PDF. This preserves the crossover layout and frequency response graphs for viewing on any device.
For Analysis: Export the simulation results (Frequency/Impedance response) to TXT or CSV to process the data in Microsoft Excel or import it into other simulation tools like VituixCAD.
For Web: Take screenshots of the crossover schematic and save as PNG or JPG for forum posts.

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

Users also converted NPF, WCT and RQS files.

FAQ

If you want to convert BPJ file to , you can use Boxsim or similar software from the "Loudspeaker Simulation Project" category. In the File menu, look for Save As… or Export….

To convert files to BPJ, try Boxsim or another comparable tool in the "Loudspeaker Simulation Project" category.

The BPJ 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 BPJ converter.