Openleetcode – Local LeetCode runner where tests live in the repo
You write a standard solution, just like on LeetCode, and run it through the CLI. It identifies the problem by ID or title, executes your code against local test cases, and shows the result. It currently supports around 1.4k problems and multiple languages, including Python, C++, Rust, Java, Go, TypeScript, Swift, and others. The project is still an MVP. System design, SQL, and concurrency problems are not supported yet, but support for more problem types is planned. Made in Haskell!
In plain words
Openleetcode is a local command-line tool that runs LeetCode-style coding problems with test cases stored in a repository. Users write solutions in supported languages like Python, Rust, Java, Go, TypeScript, and others, then execute them against local tests by problem ID or title. Currently supporting around 1.4k problems, it is designed for developers practicing coding challenges offline. System design, SQL, and concurrency problems are not yet included. The tool is built in Haskell and requires Docker for its execution backend.
written from the facts on this page · September 2026
From the sources
we have democratized the LeetCode tests. Contribute to therepanic/openleetcode development by creating an account on GitHub.
openleetcode is a local LeetCode runner built around open test suites, made in Haskell. It takes a normal solution file, finds the matching problem manifest, builds a tiny language-specific harness, sends it to a pluggable execution backend, and judges the result locally. The tests live in the repo. The runtime templates live in the repo. The CLI is just the glue. $ openleetcode submit ./solution.py --id 1 $ openleetcode submit ./solution.rs --title two-sum Demo You need Docker for the execution backend. On Linux and macOS the installer will try to start the default Piston backend for you through Docker Compose. On Windows, the installer only installs the CLI. Bring Docker yourself and…from github.com
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