What Compose Validator does
A Compose file can be valid YAML while still referencing an undefined service, network, volume, secret, or configuration. This browser-local preflight separates parse errors, invalid references, risky settings, and maintainability warnings before deployment.
Common uses
- Validate compose.yaml without installing Docker locally
- Find undefined services, volumes, networks, secrets, and configs
- Review exposed ports, latest image tags, privileged mode, and clear-text secret values
Privacy and limitations
The Compose document is parsed and checked entirely in this browser tab. No image is pulled and no container is started. YAML anchors, extensions, interpolation, platform-specific behavior, and the complete Compose Specification must still be verified with the Docker Compose version used for deployment.
Validate important output in the actual language, database, or target platform.
Frequently asked questions
Does this replace docker compose config?
No. This is a fast, private static preflight. Run docker compose config and a deployment test on the target engine before release.
Does it contact image registries?
No. Image names and tags are inspected as text only; manifests, signatures, and vulnerabilities are not downloaded.
Why can valid Compose YAML fail here?
The local parser intentionally supports a practical YAML subset and does not resolve anchors, merge keys, include files, or every interpolation rule. Use the target Compose CLI for authoritative validation.