🐳 Dockerfile Linter

The Dockerfile Linter Tool is a lightweight browser-based utility designed to help DevOps engineers, developers, and SREs validate and optimize their Dockerfiles. It scans pasted Dockerfile content for common issues like missing CMD/ENTRYPOINT, improper RUN usage, deprecated instructions, and insecure practices. It’s perfect for local testing before a CI build or Docker image deployment.

Whether you’re building containers for microservices, Kubernetes clusters, or CI/CD pipelines, clean and compliant Dockerfiles are critical for performance, security, and reliability. This tool requires no installation or account and works entirely client-side — giving you immediate feedback and suggestions to fix problems in real-time.

Paste your Dockerfile above to begin linting.