How to convert YAML and JSON
Convert YAML config files to JSON (and back) in your browser with Toolora’s YAML ↔ JSON Converter.
When to convert
YAML is common in config and CI files; JSON is common in APIs and JavaScript apps. Converting between them helps when you need the same data in both formats.
YAML → JSON
1) Open YAML ↔ JSON Converter. 2) Choose YAML → JSON. 3) Paste your YAML. 4) Copy the formatted JSON from the output pane — conversion updates as you type.
JSON → YAML
Choose JSON → YAML, paste a JSON value, and copy the YAML from the output pane. Nested objects and arrays are preserved.
Tips
Invalid YAML or JSON is rejected with an error before conversion. Tabs vs spaces in YAML matter. Duplicate keys follow the parser’s last-wins or error behavior — do not assume Kubernetes-style merge. For CSV tables, use CSV ↔ JSON at /tools/csv-json-converter. XML ↔ JSON is a different tree. JSON Formatter pretty-prints after YAML → JSON if you need indent.
Worked example
YAML name: Ada / age: 36 becomes {"name":"Ada","age":36} (numbers stay numbers when the YAML parser sees them as such). JSON → YAML of that object should round-trip the fields. Anchors, tags, and multi-document --- streams may not survive; this converter is for everyday config, not a full YAML 1.1 suite. Nothing is uploaded.
Privacy
Configs stay in the tab. Related: /tools/json-formatter, /tools/csv-json-converter, /tools/xml-json-converter. Close the page if the YAML has production secrets.