Dockerfile Linter
Inspect Dockerfile structure, stage relationships, cache patterns, portability, and common security concerns entirely in your browser.
Dockerfile input
Limits: 512 KiB, 10,000 physical lines, 5,000 logical instructions, and 5,000 displayed findings. This static check does not build images, read .dockerignore, resolve registries or base-image configuration, expand every variable, or fully implement Docker/BuildKit grammar.
Findings
Stages
Lint to inspect stages.