Click the "Select File" button above, and choose your F90 file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert F90 to another file type
To convert F90 source files to another format, you need GNU Fortran or other Developer software.
Convert a file to F90
To convert other file formats to the "Source Code File" file type, you need software like GNU Fortran or a similar tool.
About F90 files
The .F90 file extension is used for source code written in the Fortran 90 programming language. First introduced in the 1950s, Fortran remains a staple in high-performance computing, particularly for numerical weather prediction, computational fluid dynamics, and complex mathematical modeling. Fortran 90 was a major update that introduced modern programming concepts like free-form source input, array programming, and modules.
These files are essentially plain text files containing code instructions. They can be opened and edited with basic text editors like Notepad++ or Visual Studio Code, but you need a compiler like GNU Fortran (gfortran) or the Intel Fortran Compiler to convert the source code into an executable program.
Users often need to convert .F90 files because legacy Fortran code can be difficult for modern development teams to read and maintain. Running these files requires specific compiler setups, which is a barrier for non-programmers who just need to review the logic or formulas. Furthermore, plain code files are not ideal for archiving, code reviews, or presentations.
For sharing code with non-developers or for documentation purposes, convert .F90 to PDF. If you just need to ensure the file opens easily on any device without triggering unknown file warnings, convert it to TXT. If you are modernizing a legacy codebase, you might use specialized tools to translate the logic to C, CPP, or PY, although automatic translation often requires manual refinement. Drop your file here to view and convert it securely right in your browser.
Convert.Guru analyzes your F90 file, detects the exact format, and lets you read the text inside.
If you want to convert F90 file to F77, C, JS, TS, PY, JAVA, CPP, CS, PHP, RB, GO or RS, you can use GNU Fortran or similar software from the "Scientific Programming Source Code" category. In the File menu, look for Save As… or Export….
To convert SH, PY, KT, PS1, SWIFT, LUA, PL, JAVA, SCALA, JS, VBS or TS files to F90, try GNU Fortran or another comparable tool in the "Scientific Programming Source Code" category.
The F90 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 F90 converter.