YAML Formatter

Validate and format YAML online for free. Detect syntax errors, auto-indent, and convert between YAML and JSON. No signup required.

Runs entirely in your browser — files never uploaded

YAML InputValid

Formatted

server:
  host: localhost
  port: 8080
  debug: true
database:
  url: postgres://localhost:5432/mydb
  pool_size: 10
  ssl: false
logging:
  level: info
  format: json

Indent:

How to use YAML Formatter

1. Paste YAML. Paste your YAML content in the left pane.
2. Validate. Instantly see if your YAML is valid or has syntax errors.
3. Format or convert. Copy the formatted YAML or convert to JSON.

FAQ

Can I convert YAML to JSON?

Yes! Click 'Copy as JSON' to get the equivalent JSON representation.

Is my data uploaded?

No. All parsing happens in your browser using js-yaml.

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