Luacheck

At a glance

• Editor score
  6.3 / 10
• Pricing
  Open source
• Best for
  Lua developers and game-tooling projects
• Paid from
  Free
• CI support
  Yes
• Facts checked
  21 Sep 2026

• Where it wins

  • Catches globals, unused values, control-flow issues, and formatting problems
  • Supports custom definitions, warning filters, caching, and parallel checks
  • Works with Docker, GitHub Actions, LuaRocks, and multiple editors

• Where it doesn't

  • Focused on Lua rather than multiple programming languages
  • No verified autofix capability
  • Configuration may require project-specific definitions and filtering

Our verdict on Luacheck

Luacheck is an open-source command-line static analyzer and linter for Lua. It is designed for developers maintaining Lua source files, directories, and rockspecs, with particular fit for game tooling and other Lua-focused projects. Its checks cover undefined and non-standard globals, unused variables and values, uninitialized variables, redefinitions, shadowing, unreachable code, control-flow problems, and formatting violations such as line-length limits.

The product is free to use and can run locally, in Docker, or in continuous-integration workflows. GitHub Actions usage supports CI adoption, while result caching and parallel file checking can help with larger checks. Multiple output formatters, including JUnit and TAP, make results easier to feed into automated workflows. Configuration is available through command-line options, project configuration files, and inline comments, including custom global and standard-library definitions and warning filters by code or variable name.

Luacheck also fits a broad editor ecosystem: integrations include Vim, Sublime Text, Atom, Emacs, Brackets, Visual Studio Code, Nova, and Geany. LuaRocks adds a natural fit for Lua package workflows. Its scope is intentionally narrow, so teams working across several languages will need additional linters. It also does not provide a verified autofix feature, making it better suited to identifying and reporting issues than automatically rewriting code. Choose Luacheck for focused Lua diagnostics, configurable rules, and CI-friendly output; consider another tool alongside it when multi-language analysis or automated fixes is a priority.

Your product? Our editors can test Luacheck in depth and publish a review, labelled as paid · from $149/mo →

Luacheck pricing

Luacheck fact sheet

Luacheck integrations

Luacheck lists 8 integrations on its own site.

• Vim
• Sublime Text 3
• Atom
• Emacs
• Brackets
• Visual Studio Code
• Gulp
• Node.js

Alternatives to Luacheck

• ESLintA free, extensible JavaScript linter with autofix, plugins, and broad developer-tool integrations.9.4
• RuffFree Python linting and formatting with more than 900 built-in rules.9.2
• ShellCheckA free, open-source linter for shell syntax, portability, robustness and security checks.9.0

See all Luacheck alternatives →

Featured on iTechGuides

Luacheck is listed in our Linters directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update