🔧 OnlineToolKit

YAML to JSON Converter

Convert YAML to JSON online instantly. Supports nested maps, lists, scalars and comments. Free, no upload.

Frequently asked questions

Which YAML features are supported?
Nested mappings, block lists, scalars, quoted strings, booleans, null, integers, decimals, comments and simple inline arrays like [a, b, c].
Does my YAML leave the browser?
No. Conversion happens locally with JavaScript, so private config files stay on your device.
Does it support anchors, multi-line strings or flow maps?
No, this is a lightweight parser for everyday config files. Complex YAML with anchors, block scalars or multi-document streams is not supported.
Is the output valid JSON?
Yes, the result is produced with JSON.stringify, so it can be pasted straight into any JSON consumer.

This tool runs entirely in your browser. No data is uploaded anywhere.