CI/CD YAML Validator
Validate YAML syntax for GitHub Actions, GitLab CI, and other CI/CD pipelines.
Last reviewed by the Radiatus Cloud team
💡 Best Practices
- • Use proper indentation (2 spaces)
- • Quote strings with special characters
- • Validate before committing
- • Use anchors for repeated config
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Catch the YAML error before the pipeline fails
A CI/CD pipeline that will not start because of a YAML syntax error wastes a push and a round of debugging. This validator checks the YAML syntax used by GitHub Actions, GitLab CI and other pipelines, so you catch structural mistakes before you commit rather than after the run fails.
Why YAML is so easy to get wrong
YAML uses indentation to express structure, which makes it readable and unforgiving: a tab where spaces are expected, a misaligned key, or a value that needs quoting can change the meaning or break the parse entirely. Pipeline YAML compounds this with its own required structure, so a file can be valid YAML and still be an invalid pipeline. Validating the syntax first isolates the structural errors from the logical ones.
Faster feedback, kept local
Validating locally gives you the error immediately, with the position, instead of waiting for the CI system to reject the push. That tightens the loop from minutes to seconds. The validation runs in your browser, so your pipeline configuration is not uploaded.
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Frequently Asked Questions
Why does YAML break so easily?
Because it uses indentation for structure, so a tab instead of spaces, a misaligned key, or an unquoted special value can change the meaning or break the parse.
Can valid YAML still be an invalid pipeline?
Yes. The file can parse as YAML but violate the pipeline’s required structure. Validating syntax first separates structural errors from configuration ones.
Which systems does it cover?
The YAML used by GitHub Actions, GitLab CI and other CI/CD pipelines, which share YAML as their configuration format.
Why validate locally?
Because it gives the error and its position immediately, rather than waiting for the CI system to reject the push, tightening the feedback loop.
Is my configuration uploaded?
No. The validation runs entirely in your browser.
Privacy & Security
Validation happens locally.
About This Tool
This tool runs entirely in your browser. No data is sent to any server, ensuring complete privacy. Simply use the interface above to get started — no registration or login required.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.