YAML Linter Lite
Catch common YAML indentation and key spacing mistakes locally.
Catch common YAML mistakes
YAML is whitespace-sensitive, so a stray tab, inconsistent indentation, or a missing space after a colon breaks the file in ways that are hard to spot. This lite linter flags those common mistakes so you can fix them before a tool rejects the config.
Catching indentation and key-spacing issues early saves the frustrating cycle of a pipeline failing on a malformed config. Paste your YAML, review the flagged issues, and correct them — all locally, so your config never leaves your browser.
Catching YAML slips
It flags tabs, inconsistent indentation, and a missing space after a colon — the usual silent breakers. Linting runs in your browser and never uploads your file.
Frequently asked questions
What does the YAML linter check?
Tab indentation, odd numbers of indentation spaces, and keys with no space after the colon.
Why are tabs a problem in YAML?
YAML does not allow tabs for indentation. Many parsers reject the whole file because of one tab.
Is it a full YAML validator?
No. It catches the most common mistakes. Run a full parser, or your tool's own validation, before deploying.
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