YAML Formatter & Validator
Format, validate, and convert YAML to JSON instantly in your browser.
How to use this tool
Paste your YAML into the input box on the left, then click Format to normalize its indentation, Validate to check whether it's well-formed YAML, or Convert to JSON to see it as JSON. The result appears in the output box on the right, and any errors are shown below.
FAQ
Is this YAML formatter free to use?
Yes, this tool is completely free to use with no limits on how often you can use it.
Does my YAML data get uploaded anywhere?
No. All formatting, validation, and conversion happens directly in your browser. Your data never leaves your computer.
What happens if my YAML is invalid?
The tool shows a clear error message describing what's wrong, including the line and column where the problem was found.
Related Tools
JSON Formatter & Validator
Format, minify, and validate JSON instantly in your browser.
XML Formatter & Validator
Format and validate XML instantly in your browser.
Markdown to HTML Preview
Preview Markdown as rendered HTML, with a raw HTML view you can copy.
SQL Formatter
Format and beautify SQL queries with Standard SQL, MySQL, and PostgreSQL support.