YAML to JSON Converter

Convert YAML into clean, valid JSON directly in your browser for APIs, config debugging, automation workflows, and developer tooling. It is especially useful when working with Kubernetes manifests, CI/CD files, Docker Compose, and other YAML-based configuration that needs to be transformed into JSON for validation or downstream systems. ToolMill runs client-side for privacy and can work offline as a PWA.

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Try it

Examples

Basic JSON object to YAML

Input

{"name":"ToolMill","features":["offline","client-side"],"limits":{"maxPayloadKB":256}}

Output

name: "ToolMill"
features:
  - "offline"
  - "client-side"
limits:
  maxPayloadKB: 256

Nested YAML data to JSON

Input

service: api
replicas: 3
ports:
  - 80
  - 443
env:
  NODE_ENV: production
  DEBUG: false

Output

{"service":"api","replicas":3,"ports":[80,443],"env":{"NODE_ENV":"production","DEBUG":false}}

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