YAML Tools
Docker Compose Validator
Validate docker-compose.yml files for common errors.
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What is Compose Check?
A structural validator for Docker Compose: it checks that services exist, each has image or build, and that sections like volumes/ports are well-formed.
How it works
The YAML is parsed and inspected against compose conventions: services must be a mapping, each service needs image or build, and ports should be a list.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Realistic sample
Paste or type any realistic input — the tool computes the result locally and instantly.
Common mistakes
Expecting a server round-trip
Nothing is uploaded — every tool in this category runs entirely in your browser.