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Dockerfile Linter (Best Practices Checker)

Analyze Dockerfiles and detect issues and best practice violations.

Free online tool. No signup required. All processing runs in your browser.

    About this tool

    Paste your Dockerfile to detect common mistakes and improve container builds.

    What is Dockerfile Linter (Best Practices Checker)?

    A linter checks code for errors and best practices.

    How to use Dockerfile Linter (Best Practices Checker)

    1. Paste Dockerfile.
    2. Run lint check.
    3. Fix issues.

    Examples

    Example input

    FROM node

    Example output

    Warning: specify version tag

    FAQ

    Why lint Dockerfiles?
    To improve security and performance.
    Are these tools free?
    Yes. All tools on DevToolsHub are free to use.
    Does the tool store my data?
    No. Processing happens in your browser. We do not store or send your input to any server.
    Can I use the output in production?
    Yes. Use the result as you like; we do not claim any rights over the output.

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