YAML Validator
// Validate YAML syntax
#About YAML Validator
Free online YAML validator. Check your YAML syntax for errors including indentation issues, tab characters, unbalanced quotes, and invalid structures. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
#FAQ
How do I validate YAML? ▾
Paste your YAML content into the input field. The validator checks for common syntax errors including tab characters (not allowed in YAML), unbalanced quotes, unbalanced brackets in flow mappings, and invalid directives.
What YAML errors does it detect? ▾
The validator detects tab characters, unbalanced quotes and brackets, duplicate colons in unquoted keys, invalid flow mappings and sequences, and unterminated multiline strings.
</> Embed this tool ▾
Copy this code to embed the tool on your website. Adjust the height to fit your layout.
<iframe src="https://www.browserutils.dev/embed/yaml-validator" width="100%" height="500" frameborder="0" title="YAML Validator"></iframe>