YAML to JSON Converter

Paste YAML and convert it into formatted JSON for APIs, scripts, and config migration.

All data conversion happens locally in your browser. No JSON, CSV, YAML, or XML is sent to our servers.
YAMLJSON

Quick examples

Convert YAML config into formatted JSON

YAML to JSON helps when configuration, CI snippets, infrastructure examples, or documentation data need to be used by APIs, scripts, test fixtures, or stricter validation tools. The converter parses one YAML document and writes indented JSON.

JSON is less expressive than YAML. Comments, anchors, aliases, and some YAML-specific syntax do not have a direct JSON equivalent, so review the output before using it as a production config.

What to review after conversion

  • Comments and anchors that helped explain the original YAML.
  • Implicit YAML values such as true, false, null, and numbers.
  • Quoted values that must stay strings in the JSON output.
  • Multi-document YAML separated with ---, which should be split before converting.
String note: quote YAML values when a numeric-looking value must remain a string, such as an ID, ZIP code, or version number.

YAML to JSON FAQ

Are YAML comments, anchors, and aliases preserved?

No. JSON does not support comments, anchors, or aliases, so those YAML-only features are not represented in the output.

Why did a YAML value change type?

YAML can infer booleans, nulls, and numbers. Quote a value in YAML if it must remain a JSON string.

Can this convert multiple YAML documents at once?

This converter is intended for one YAML document. Split multi-document YAML before converting so each document has a clear JSON output.