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Verify your code consistency with an open-source tool.
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MegaLinter is an open-source tool for CI/CD workflows that analyzes the consistency of your code, IaC, configuration, and scripts in your repository to ensure all your project sources are clean and formatted, no matter which IDE or toolbox is used by your developers. Powered by OX Security.

Supports 65 languages, 22 formats, 20 tooling formats, and is ready to use out of the box as a GitHub Action or with any CI system. It is highly configurable and free for all uses.

MegaLinter has native integrations with many major CI/CD tools.

Upgrade to MegaLinter v9 :):

• Use the new LLM Advisor that will tell you how to fix linters issues
• Create your own MegaLinter Custom Flavors to improve performance

Why MegaLinter

Projects need to contain clean code in order to avoid technical debt, which makes ongoing maintenance harder and more time-consuming.

By using code formatters and code linters, you ensure that your codebase is easier to read and follows best practices, from kickoff through each step of the project lifecycle.

Not all developers use linters in their IDEs, which makes code reviews harder and longer to process.

By using MegaLinter, you'll enjoy the following benefits for your team:

• At each pull request, it automatically analyzes all updated code across all languages.
• By reading error logs, developers learn best practices for the languages they use.
• The MegaLinter documentation provides a list of IDE plugins for each linter, so developers know which linter and plugins to install.
• MegaLinter works out of the box after a quick setup.
• Formatting and fixes can be automatically applied directly to the Git branch or provided in reports.
• This tool is 100% open source and free for all uses (personal, professional, public, and private repositories).
• MegaLinter can run on any CI tool and be run locally: no need to authorize an external application, and your codebase never leaves your tooling ecosystem.

Supported Linters

All linters are integrated into the MegaLinter Docker image, which is frequently updated with their latest versions.

Languages

	Language	Linter	Additional
	BASH	bash-exec BASH_EXEC
	BASH	shellcheck BASH_SHELLCHECK
	BASH	shfmt BASH_SHFMT
	C	cppcheck C_CPPCHECK
	C	cpplint C_CPPLINT
	C	clang-format C_CLANG_FORMAT
	CLOJURE	clj-kondo CLOJURE_CLJ_KONDO
	CLOJURE	cljstyle CLOJURE_CLJSTYLE
	COFFEE	coffeelint COFFEE_COFFEELINT
	C++ (CPP)	cppcheck CPP_CPPCHECK
	C++ (CPP)	cpplint CPP_CPPLINT
	C++ (CPP)	clang-format CPP_CLANG_FORMAT
	C# (CSHARP)	dotnet-format CSHARP_DOTNET_FORMAT
	C# (CSHARP)	csharpier CSHARP_CSHARPIER
	C# (CSHARP)	roslynator CSHARP_ROSLYNATOR
	DART	dartanalyzer DART_DARTANALYZER
	GO	golangci-lint GO_GOLANGCI_LINT
	GO	revive GO_REVIVE
	GROOVY	npm-groovy-lint GROOVY_NPM_GROOVY_LINT
	JAVA	checkstyle JAVA_CHECKSTYLE
	JAVA	pmd JAVA_PMD
	JAVASCRIPT	eslint JAVASCRIPT_ES
	JAVASCRIPT	standard JAVASCRIPT_STANDARD
	JAVASCRIPT	prettier JAVASCRIPT_PRETTIER
	JSX	eslint JSX_ESLINT
	KOTLIN	ktlint KOTLIN_KTLINT
	KOTLIN	detekt KOTLIN_DETEKT
	LUA	luacheck LUA_LUACHECK
	LUA	selene LUA_SELENE
	LUA	stylua LUA_STYLUA
	MAKEFILE	checkmake MAKEFILE_CHECKMAKE
	PERL	perlcritic PERL_PERLCRITIC
	PHP	phpcs PHP_PHPCS
	PHP	phpstan PHP_PHPSTAN
	PHP	psalm PHP_PSALM
	PHP	phplint PHP_PHPLINT
	PHP	php-cs-fixer PHP_PHPCSFIXER
	POWERSHELL	powershell POWERSHELL_POWERSHELL
	POWERSHELL	powershell_formatter POWERSHELL_POWERSHELL_FORMATTER
	PYTHON	pylint PYTHON_PYLINT
	PYTHON	black PYTHON_BLACK
	PYTHON	flake8 PYTHON_FLAKE8
	PYTHON	isort PYTHON_ISORT
	PYTHON	bandit PYTHON_BANDIT
	PYTHON	mypy PYTHON_MYPY
	PYTHON	pyright PYTHON_PYRIGHT
	PYTHON	ruff PYTHON_RUFF
	PYTHON	ruff-format PYTHON_RUFF_FORMAT
	R	lintr R_LINTR
	RAKU	raku RAKU_RAKU
	RUBY	rubocop RUBY_RUBOCOP
	RUST	clippy RUST_CLIPPY
	SALESFORCE	sfdx-scanner-apex SALESFORCE_SFDX_SCANNER_APEX
	SALESFORCE	sfdx-scanner-aura SALESFORCE_SFDX_SCANNER_AURA
	SALESFORCE	sfdx-scanner-lwc SALESFORCE_SFDX_SCANNER_LWC
	SALESFORCE	lightning-flow-scanner SALESFORCE_LIGHTNING_FLOW_SCANNER
	SCALA	scalafix SCALA_SCALAFIX
	SQL	sqlfluff SQL_SQLFLUFF
	SQL	tsqllint SQL_TSQLLINT
	SWIFT	swiftlint SWIFT_SWIFTLINT
	TSX	eslint TSX_ESLINT
	TYPESCRIPT	eslint TYPESCRIPT_ES
	TYPESCRIPT	ts-standard TYPESCRIPT_STANDARD
	TYPESCRIPT	prettier TYPESCRIPT_PRETTIER
	Visual Basic .NET (VBDOTNET)	dotnet-format VBDOTNET_DOTNET_FORMAT

Formats

	Format	Linter	Additional
	CSS	stylelint CSS_STYLELINT
	ENV	dotenv-linter ENV_DOTENV_LINTER
	GRAPHQL	graphql-schema-linter GRAPHQL_GRAPHQL_SCHEMA_LINTER
	HTML	djlint HTML_DJLINT
	HTML	htmlhint HTML_HTMLHINT
	JSON	jsonlint JSON_JSONLINT
	JSON	eslint-plugin-jsonc JSON_ESLINT_PLUGIN_JSONC
	JSON	v8r JSON_V8R
	JSON	prettier JSON_PRETTIER
	JSON	npm-package-json-lint JSON_NPM_PACKAGE_JSON_LINT
	LATEX	chktex LATEX_CHKTEX
	MARKDOWN	markdownlint MARKDOWN_MARKDOWNLINT
	MARKDOWN	remark-lint MARKDOWN_REMARK_LINT
	MARKDOWN	markdown-table-formatter MARKDOWN_MARKDOWN_TABLE_FORMATTER
	PROTOBUF	protolint PROTOBUF_PROTOLINT
	RST	rst-lint RST_RST_LINT
	RST	rstcheck RST_RSTCHECK
	RST	rstfmt RST_RSTFMT
	XML	xmllint XML_XMLLINT
	YAML	prettier YAML_PRETTIER
	YAML	yamllint YAML_YAMLLINT
	YAML	v8r YAML_V8R

Tooling formats

	Tooling format	Linter	Additional
	ACTION	actionlint ACTION_ACTIONLINT
	ANSIBLE	ansible-lint ANSIBLE_ANSIBLE_LINT
	API	spectral API_SPECTRAL
	ARM	arm-ttk ARM_ARM_TTK
	BICEP	bicep_linter BICEP_BICEP_LINTER
	CLOUDFORMATION	cfn-lint CLOUDFORMATION_CFN_LINT
	DOCKERFILE	hadolint DOCKERFILE_HADOLINT
	EDITORCONFIG	editorconfig-checker EDITORCONFIG_EDITORCONFIG_CHECKER
	GHERKIN	gherkin-lint GHERKIN_GHERKIN_LINT
	KUBERNETES	kubeconform KUBERNETES_KUBECONFORM
	KUBERNETES	helm KUBERNETES_HELM
	KUBERNETES	kubescape KUBERNETES_KUBESCAPE
	PUPPET	puppet-lint PUPPET_PUPPET_LINT
	SNAKEMAKE	snakemake SNAKEMAKE_LINT
	SNAKEMAKE	snakefmt SNAKEMAKE_SNAKEFMT
	TEKTON	tekton-lint TEKTON_TEKTON_LINT
	TERRAFORM	tflint TERRAFORM_TFLINT
	TERRAFORM	terrascan TERRAFORM_TERRASCAN
	TERRAFORM	terragrunt TERRAFORM_TERRAGRUNT
	TERRAFORM	terraform-fmt TERRAFORM_TERRAFORM_FMT

Other

	Code quality checker	Linter	Additional
	COPYPASTE	jscpd COPYPASTE_JSCPD
	REPOSITORY	checkov REPOSITORY_CHECKOV
	REPOSITORY	devskim REPOSITORY_DEVSKIM
	REPOSITORY	dustilock REPOSITORY_DUSTILOCK
	REPOSITORY	git_diff REPOSITORY_GIT_DIFF
	REPOSITORY	gitleaks REPOSITORY_GITLEAKS
	REPOSITORY	grype REPOSITORY_GRYPE
	REPOSITORY	kics REPOSITORY_KICS
	REPOSITORY	ls-lint REPOSITORY_LS_LINT
	REPOSITORY	secretlint REPOSITORY_SECRETLINT
	REPOSITORY	semgrep REPOSITORY_SEMGREP
	REPOSITORY	syft REPOSITORY_SYFT
	REPOSITORY	trivy REPOSITORY_TRIVY
	REPOSITORY	trivy-sbom REPOSITORY_TRIVY_SBOM
	REPOSITORY	trufflehog REPOSITORY_TRUFFLEHOG
	SPELL	cspell SPELL_CSPELL
	SPELL	proselint SPELL_PROSELINT
	SPELL	vale SPELL_VALE
	SPELL	lychee SPELL_LYCHEE