Docker Compose Validator
How to Use the Docker Compose Validator
Paste a Docker Compose YAML file to check its basic structure, indentation and common service configuration fields before running it locally or in CI.
Practical Example
A compose file with a services section but an incorrectly indented image field can be identified as structurally invalid before you run docker compose up.
Factors That Affect the Result
Compose specification version, extension fields, environment substitution, indentation and service-specific options can affect validation. Some runtime errors require the Docker engine to detect.
Frequently Asked Questions
Does this run Docker containers?
No, it checks configuration text rather than starting services.
Can environment variables affect validity?
Yes, unresolved or malformed substitutions can cause issues at runtime.
Should I still run docker compose config?
Yes, engine-side validation is a useful final check.