Converters

YAML to JSON Converter

Parse YAML into pretty-printed JSON — the quickest way to feed config data into APIs and code.

Conversion runs locally in your browser. Nothing is uploaded, logged, or stored.

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How to use

  1. Paste your YAML document into the input panel.
  2. Click Convert to parse it and serialize the result as indented JSON.
  3. Copy or download the JSON for use in your API call, code, or test fixture.

How the conversion works

The YAML is parsed with a full YAML 1.2 parser: nested mappings become JSON objects, dash lists become arrays, and scalars keep their inferred types — yes/no style booleans, integers, floats, and dates are resolved per the core schema. Comments are dropped, since JSON has no comment syntax. Anchors and aliases are resolved to their final values.

If the YAML has a syntax error, the parser reports the line and column so you can fix it fast. Need the opposite direction? Use the JSON to YAML converter, or jump between other formats with the YAML to XML and YAML to CSV converters.

Examples

Config into an API request

Convert a YAML config file to JSON so you can paste it straight into Postman or curl as a request body.

Values file inspection

Turn a Helm values.yaml into JSON to diff it programmatically or load it in a script.

Frequently Asked Questions

Is my data uploaded anywhere?+
No. The YAML is parsed and serialized entirely in your browser.
What YAML features are supported?+
Nested mappings, lists, multi-line strings (| and >), anchors and aliases (resolved to plain values), comments (discarded), and scalar type resolution.
How are YAML types mapped to JSON?+
Booleans, integers, floats, null, and strings map directly. Dates become ISO-8601 strings, which is the closest JSON representation.
What if my YAML is invalid?+
The parser error is shown with line and column numbers above the output panel, so you can locate the problem quickly.

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