lfortran/lfortran

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

1254 stars · 282 forks observed · 2026-10-21

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

LFortran is a modern open-source interactive Fortran compiler built on LLVM that can execute code interactively like a REPL and also compile to fast binaries for CPUs and GPUs. It includes a Jupyter kernel for exploratory Fortran work and is progressing toward reliably compiling production Fortran codes.

Use cases

• run fortran code interactively like a repl
• compile fortran to fast binaries with llvm
• use fortran in jupyter notebooks
• port legacy fortran scientific code to gpus
• explore numerical algorithms interactively
• compile scipy or lapack style fortran libraries

When to choose

• you want an interactive, exploratory Fortran workflow similar to Python or Julia
• you need a modern LLVM-based Fortran compiler targeting multi-core CPUs and GPUs
• you want to run Fortran in Jupyter notebooks or the browser via WebAssembly

When to avoid

• you need a fully mature production compiler for arbitrary third-party Fortran code today
• you require complete Fortran standard coverage and guaranteed correctness for critical builds
• you just need a traditional batch compiler and have no need for interactivity

Facets

library · maturity active

compiler interpreter developer-tools compilers programming-languages developer-tools windows cpp wasm fortran llvm repl jupyter-kernel interactive-compiler hpc scientific-computing linux macos gpu

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