YAML Tools
GitLab CI Linter
Validate .gitlab-ci.yml files for common structural errors.
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What is GitLab CI?
A linter for GitLab CI files: it verifies jobs are mappings, each has a script (or trigger/include), and the file parses cleanly.
How it works
The YAML is parsed and every top-level key that isn't reserved (stages, variables, default…) is treated as a job and checked for script/trigger/include.
- 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.