Extract text from Fortran 77 source files (F77)
To convert F77 source files to another format, you need GCC (gfortran) or other Developer software.
To convert other file formats to the "Fortran Source Code" file type, you need software like GCC (gfortran) or a similar tool.
The .f77 file contains procedural source code written in Fortran 77, a legacy standardization of the Fortran programming language heavily used in scientific, engineering, and numerical computing. These files consist of human-readable plain text but strictly adhere to rigid, punch-card-era column formatting rules.
You can open, edit, and compile .f77 files using dedicated compilers like GNU Fortran (gfortran) or the Intel Fortran Compiler. For simple viewing, any text editor like Notepad++ will work. You can read more about the language on its Wikipedia page.
Users frequently need to convert .f77 files because the format is outdated and cumbersome. The rigid 72-character line limits and fixed-form syntax are frustrating for modern developers. Sharing raw .f77 files is also problematic because non-programmers lack the tools to view syntax-highlighted code, and running the logic requires installing bulky, specialized compiler toolchains.
For code modernization, the best conversion targets are C or CPP using specialized translation tools like f2c. For documentation, code review, or sharing, converting .f77 to TXT, HTML, or PDF is highly recommended. Note that converting to a PDF drops the ability to compile the code, but guarantees the strict column spacing remains perfectly intact.
Source code files can be difficult to process because standard document converters do not understand compiler syntax or execution environments.
Convert.Guru analyzes your F77 file, detects the exact format, and lets you read the text inside.
Users also converted FOR, F, F90 and F95 files.
If you want to convert F77 file to F90, F95, JS, TS, PY, JAVA, CPP, C, CS, PHP, RB or GO, you can use GCC (gfortran) or similar software from the "Legacy Scientific 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 F77, try GCC (gfortran) or another comparable tool in the "Legacy Scientific Source Code" category.
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 F77 converter.