YAML → JSON

FreePrivatejs-yaml

Turn YAML into strict JSON for APIs, browsers, and tools that only accept JSON.

Need the other direction? JSON → YAML

YAML input

JSON output

Ctrl+Enter Convert

YAML to JSON Converter Online

Many services only accept JSON request bodies. When your source of truth is YAML (Helm values, Compose files, or hand-written CI config), paste it here to get strict, pretty-printed JSON you can drop into Postman, OpenAPI examples, or application code.

Where Is This Useful?

API testing

Turn YAML fixtures into JSON bodies for REST clients and integration tests. Validate JSON with the JSON Formatter before sending requests.

Interop

Bridge YAML-first ops repos with JSON-first frontends. When teams bounce between formats, keep samples aligned using JSON Diff.

Round-trip

Edited JSON? Convert back with JSON → YAML when you need YAML again.

How to Use

Paste a single YAML document in the input panel
Click Convert or press Ctrl+Enter
Copy formatted JSON or use the copy menu on the output panel

Example

Input YAML

app:
  name: payments
  debug: false
  ports:
    - 8080

JSON output

{
  "app": {
    "name": "payments",
    "debug": false,
    "ports": [8080]
  }
}

Features

Pretty-printed JSON with expandable structure
Syntax-highlighted JSON output panel
Powered by js-yaml for broad real-world YAML
Local recent-input history
No upload. runs offline-friendly in the browser

Frequently Asked Questions

Which YAML version?

The tool uses js-yaml, which supports common YAML 1.2 constructs used in developer configs.

Can I paste multi-document YAML?

Stick to a single YAML document for predictable JSON output. Split multi-doc files before pasting.

Is anything uploaded?

No. Parsing and formatting happen in your browser only.