Tool reference

YAML ↔ JSON

beta

Convert between YAML and JSON bidirectionally with live validation, Monaco editor syntax highlighting, configurable indentation, and conversion timing stats.

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Quickstart

Use this when you want the shortest path from input to a useful result.

Select the direction: YAML → JSON or JSON → YAML.

Paste your content into the left editor.

The converted output appears in the right editor instantly.

Best for

Common situations where this tool fits naturally into the workflow.

Convert docker-compose.yml or Kubernetes manifests to JSON for API payloads.
Transform JSON API responses into YAML for readable config files.
Validate YAML syntax and see the parse error immediately in the output panel.

Common tasks

Concrete ways this tool is typically used in day-to-day workflows.

Convert docker-compose YAML to JSON

Select YAML → JSON, paste your docker-compose.yml, and copy the JSON output for use in API calls or config management tools.

Convert a JSON API payload to YAML

Select JSON → YAML, paste the JSON response body. The YAML output is formatted for readability with configurable indentation.

Validate YAML syntax

Paste any YAML into the input. Parse errors appear immediately in the output panel with the line and column where the error occurred.

Examples

Real inputs and outputs that show how the tool behaves.

YAML to JSON

A simple YAML mapping converted to formatted JSON.

YAML input

name: devforge
version: 2.4.0
active: true

JSON output

{
  "name": "devforge",
  "version": "2.4.0",
  "active": true
}

Features

What this tool includes and what each capability is for.

Bidirectional

Switch direction at any time — YAML to JSON or JSON to YAML.

Split editors

Monaco syntax highlighting in both input and output panes.

Live conversion

Output updates as you type with deferred rendering for performance.

Indent control

Choose 2 or 4 spaces for formatted output.

Workflow

Follow this path to get from input to output quickly.

Choose the conversion direction from the direction selector.

Paste your YAML or JSON into the left editor.

Review the converted output in the right editor.

If there is a parse error, fix the issue highlighted in the error panel.

Click Copy result or use the ToolShell copy button to copy the output.

Caveats and tips

Things to keep in mind before relying on the output in a larger workflow.

Caveats

YAML supports types (dates, binary, null variants) that have no direct JSON equivalent — these are serialized as strings.
JSON does not support comments; YAML comments are stripped during conversion.
Multi-document YAML files (separated by ---) are not supported — only the first document is parsed.

Tips

Use 4-space indent for YAML output when your team's style guide requires it.
The timing stat in the footer shows how long the parse + serialize step took.
Both editors support Monaco's full keyboard shortcuts for selection and editing.