Hadolint

At a glance

• Editor score
  7.1 / 10
• Pricing
  Free plan
• Best for
  Teams linting Dockerfiles in CI
• Free plan
  Yes
• Paid from
  Free
• CI support
  Yes
• Facts checked
  23 Sep 2026

• Where it wins

  • Checks Dockerfile instructions and inline shell commands in RUN instructions.
  • Supports trusted-registry checks and label validation against a configurable schema.
  • Offers configurable output, rule severity, and CI workflow integrations.

• Where it doesn't

  • Its scope is focused on Dockerfiles and inline shell commands.
  • Rule customization is limited to ignored rules and severity overrides.
  • Support channels are community and documentation.

Our verdict on Hadolint

Hadolint is an open-source command-line linter for Dockerfiles, aimed at developers and teams that want rule-based checks in their build and CI workflows. It checks Dockerfile instructions and analyzes shell commands inside RUN instructions, then reports findings in configurable formats. Teams can tune ignored rules and severity, check trusted registries in FROM instructions, and validate required labels against a configurable schema. The focused scope suits Dockerfile quality checks; it is not a general-purpose linter for unrelated code.

CI fit is a central strength. Hadolint documents workflows and integrations for Azure DevOps Pipelines, Bitbucket Pipelines, CircleCI, Drone CI, GitHub Actions, GitLab CI, Jenkins, and Travis CI. Its output options include JSON, SARIF, and JUnit, giving teams choices for consuming findings in pipeline workflows. It can be installed as a binary, run in a container, or used in CI pipelines, with cloud, self-hosted, and desktop deployment options. Choose it when Dockerfile checks belong alongside existing CI processes; choose another tool if the main need is linting beyond Dockerfiles and their inline shell commands.

The project is open source and has a free plan, with no paid tiers described here. Its configuration covers ignored rules, severity overrides, trusted registries, and a schema for required labels, while the rule checks remain centered on Dockerfiles and RUN shell commands. Documentation and community are the support channels. That makes Hadolint a practical fit for solo users through enterprise teams seeking a specialized, configurable check in their pipeline. It is a less suitable choice for teams seeking broader language coverage or a tool whose central purpose is something other than Dockerfile linting.

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Hadolint pricing

Hadolint fact sheet

Hadolint integrations

Hadolint lists 8 integrations on its own site.

• Azure DevOps Pipelines
• Bitbucket Pipelines
• CircleCI
• Drone CI
• GitHub Actions
• GitLab CI
• Jenkins
• Travis CI

Alternatives to Hadolint

• 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 Hadolint alternatives →

Featured on iTechGuides

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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