YAML ↔ JSON Converter

How to use

Paste YAML or JSON into the input panel, then click Convert. The result appears in the output panel instantly. Switch direction with the arrow button. Copy the result or click Format to beautify the output.

Why use this tool

Switch between YAML (human-readable config files) and JSON (API and code format) without installing any tools. Syntax errors are highlighted in real time. Everything runs locally — no data is uploaded.

FAQ

Can I convert multi-document YAML?

Single-document YAML is fully supported. Multi-document YAML (separated by ---) converts the first document only.

Is my data sent to a server?

No. All conversion uses JavaScript libraries running entirely in your browser.

What YAML features are supported?

Anchors, aliases, block sequences, mappings, and most YAML 1.2 features are supported via the js-yaml library.