Does it support nested lists and maps?

Yes, the parser handles arbitrary nesting of maps and lists.

Are comments supported?

Lines starting with # are ignored when parsing YAML.

Is this a full YAML spec implementation?

No, it covers the common subset used in config files — anchors and multi-document files aren't supported.

Yaml Json Converter

Convert YAML to JSON and JSON to YAML.

Works Offline

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No Login

No API

YAML input

Output

{
  "name": "Ada",
  "skills": [
    "logic",
    "math"
  ],
  "address": {
    "city": "London",
    "zip": "90210"
  }
}

About the Yaml Json Converter

A hand-written YAML parser and serializer supporting nested maps, lists, and scalars, so you can convert configuration files between YAML and JSON without leaving your browser.

Examples

Simple YAML

name: Ada

Output

{"name":"Ada"}

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser