YAML ⇄ JSON
Convert YAML to JSON and JSON to YAML online for free. Validate and reformat config files instantly in your browser.
How to use the YAML ⇄ JSON
- Choose a direction: YAML → JSON or JSON → YAML.
- Paste your config or data on the left (or click Load sample).
- The converted output appears instantly on the right, with errors flagged inline.
- Use Copy or Download to save the result.
Frequently asked questions
Why convert between YAML and JSON?
YAML is easy for humans to read and write (great for config files), while JSON is ubiquitous in APIs and tooling. Converting lets you move data between the two without hand-editing.
Does it keep my data types?
Yes. Numbers, booleans, null, strings, nested objects, and arrays are preserved. YAML anchors and multi-document files follow the standard js-yaml parsing rules.
Why am I getting a parse error?
YAML is indentation-sensitive — mixing tabs and spaces or misaligning keys is a common cause. For JSON, watch for trailing commas or single quotes. The status line shows the exact error.
Is my data uploaded?
No. Parsing and conversion happen entirely in your browser. Your config files and data never leave your device.