JSON vs YAML

Differences, pros & cons — when to use which format

Same Data, Two Formats

JSON

{
  "user": "alice",
  "roles": ["admin", "editor"],
  "settings": {
    "theme": "dark",
    "notifications": true
  }
}

YAML

user: alice
roles:
  - admin
  - editor
settings:
  theme: dark
  notifications: true

Comparison Table

Aspect	JSON	YAML
Syntax	Braces, brackets, quotes	Indentation, colons, dashes
Readability	Dense, machine-friendly	Human-readable, minimal punctuation
Comments	Not supported	Supported with #
Data types	Strings, numbers, booleans, null, arrays, objects	Same + dates, multiline strings, anchors
File size	Larger (more punctuation)	Typically smaller
Parsing speed	Faster (simpler grammar)	Slower (more complex)
Ecosystem	Universal (APIs, configs, DBs)	DevOps, Kubernetes, Ansible, CI/CD
Use cases	APIs, web configs, data exchange	Config files, infrastructure as code

Verdict

Use JSON for APIs, web configs, and data exchange — it's universally supported and fast to parse. Use YAML for config files, Kubernetes manifests, CI/CD pipelines, and infrastructure as code — comments and readability matter there.

Both are interchangeable for many use cases. DuskTools lets you convert between them instantly.