Click the "Select File" button above, and choose your OP2 file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert OP2 to another file type
To convert OP2 simulation results to another format, you need MSC Nastran or other Data software.
Convert a file to OP2
To convert other file formats to the "FEA Simulation Results" file type, you need software like MSC Nastran or a similar tool.
About OP2 files
An .OP2 file is a binary results file generated by Nastran, a widely used finite element analysis (FEA) solver. Engineers use this file to store simulation outputs such as displacements, stresses, strains, and eigenvectors. Because FEA simulations generate massive amounts of data, the .OP2 format is written in a compiled, binary structure to maximize read and write speeds. To open and analyze an .OP2 file, you typically need expensive, specialized post-processing software like MSC Nastran, Siemens Simcenter, or Patran. Users also frequently rely on Python libraries like pyNastran to programmatically extract the data. For more context on the underlying technology, you can refer to the Nastran Wikipedia page. The primary disadvantage of the .OP2 format is that it is a closed, highly proprietary binary format. The files can easily exceed tens of gigabytes. You cannot open them in a standard text editor or a web browser, and sharing them requires the recipient to have a $50,000+ commercial software license. Users often want to convert .OP2 files to accessible data formats like CSV, TXT, or HDF5 to generate reports or plot graphs in Microsoft Excel or Python. Converting to a text format makes the data human-readable but drastically increases the file size and strips away native 3D post-processing capabilities. Because this is a proprietary binary format tailored to specific FEA software versions, standard online converters fail to process it. Only the original software or dedicated parsers can properly interpret the complex node and element data. However, just drag and drop your .OP2 file into convert.guru to identify the exact file signature, inspect its binary headers, and extract any readable internal text. If our analysis detects a supported embedded data structure, viewing or partial conversion may still be possible.
Convert.Guru analyzes your OP2 file, detects the exact format, and lets you read the text inside.
Users also converted WM3, BDT, CSB, OP1 and H3D files.
FAQ
If you want to convert OP2 file to H3D, CSV, JSON, XML, YAML, YML, TOML, INI, CFG, CONF, DAT or DB, you can use MSC Nastran or similar software from the "FEA Binary Results Storage" category. In the File menu, look for Save As… or Export….
To convert DBF, XML, SQLITE, XLSX, SQL, TSV, ACCDB, YAML, MDB, CSV, ODS or JSON files to OP2, try MSC Nastran or another comparable tool in the "FEA Binary Results Storage" category.
The OP2 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 OP2 converter.