YAML Formatter / Validator
Format, validate YAML files, and convert YAML ↔ JSON. Powered by js-yaml — handles nesting, anchors, multiline strings.
INPUT
OUTPUT
What is YAML Formatter?
YAML Formatter is a free online tool that validates and formats YAML files. It detects syntax errors instantly and can convert YAML to JSON format without any registration.
How to format YAML online?
- Paste your YAML content into the input field
- Click "Format" to validate and beautify the YAML
- Use "Convert to JSON" to transform YAML into JSON format
- Copy the result with one click
Is this YAML tool free?
Yes, completely free. No registration, no data storage. Your YAML content is processed entirely in your browser.