Why Convert YAML to JSON?
YAML is human-readable and popular in configuration files (Docker Compose, Kubernetes, GitHub Actions), but JSON is the standard for APIs, configuration management tools, and data interchange. Converting YAML to JSON gives you the best of both worlds: readable source YAML and universal JSON compatibility.
YAML vs JSON: When to Use Each
YAML: Configuration files, Docker Compose, Kubernetes manifests, GitHub Actions workflows. Supports comments, anchors, and multi-line strings natively.
JSON: APIs, configuration management (Ansible, Prometheus), data interchange between services. No comments but universally supported.
Common YAML Syntax Gotchas
Tabs vs spaces: YAML requires spaces, not tabs. Indent with 2 spaces consistently.
Unquoted strings: yes, no, on, off are interpreted as booleans. Quote them if you want strings: "yes".
Colons in values: url: http://example.com needs quoting if not using HTTP(S) scheme.
What This Tool Does Differently
This tool validates your YAML before converting. If there are syntax errors (missing colon, inconsistent indentation), it shows the exact line and column so you can fix it. Unlike some converters that silently produce broken JSON, this validates first.
Frequently Asked Questions
Is YAML to JSON conversion lossless?
Yes and no. YAML anchors (e.g., &anchor and *alias) are resolved in the JSON output. Comments in the YAML are lost since JSON doesn't support them. Multi-line strings with | or > become single-line strings with \n.
How do I convert a YAML array to JSON?
Paste the array section from your YAML. If it starts with a dash (-), it's an array. The output will be a JSON array: ["item1", "item2", ...].
Why does my YAML output "null" in JSON?
YAML ~ (tilde) represents null. In JSON it becomes null. Empty YAML values also become null.
Can I convert JSON back to YAML?
This tool converts YAML to JSON only. For the reverse (JSON to YAML), use our JSON to YAML converter tool.