JSON ⇄ YAML Converter
Convert JSON to YAML and YAML to JSON with error reporting.
Paste JSON to get clean YAML, or paste YAML to get formatted JSON. Invalid input shows the parser error so you can fix it. Everything runs locally in your browser.
YAML output
name: Toolhaus tags: - fast - free
Formula & methodology
JSON is parsed natively; YAML is parsed and emitted with js-yaml. Output is 2-space indented.
Worked example
- {"name":"app","ports":[80,443]} → name: app\nports:\n - 80\n - 443
Frequently asked questions
Is my data uploaded?
No. Conversion happens entirely in your browser.
Which YAML version is supported?
YAML 1.2 core schema via js-yaml. Anchors and most standard features are supported.
Privacy
All processing happens locally in your browser. Your data is never uploaded.