When you need your YAML as JSON
Your CI/CD pipeline config is YAML. Your deployment script expects JSON. Your Kubernetes manifest is YAML. The API you’re calling with kubectl returns JSON. Your monitoring tool ingests JSON, but your config is YAML.
It’s the same data, just different serialization. Paste the YAML, pick your indentation (2 or 4 spaces), click convert. Key-value mappings become JSON objects, arrays stay arrays, data types are preserved correctly.
What gets converted
Standard YAML constructs all map cleanly:
key: valuepairs → JSON object properties- Indented blocks → nested JSON objects
- Lines starting with
-→ JSON arrays - Inline arrays
[a, b, c]→ JSON arrays - Inline objects
{key: value}→ JSON objects - Strings, integers, floats, booleans, null → correct JSON types
- Single-quoted and double-quoted strings → JSON strings
Why you’d convert
API integration. Your config lives in YAML but the API expects a JSON request body. Convert instead of rewriting.
Kubernetes scripting. K8s management tools and scripts often work with JSON representations. kubectl get can output JSON, but your manifests are YAML. Converting between them is a regular need.
CI/CD debugging. Something’s wrong with your pipeline config. Converting to JSON lets you verify the data structure programmatically or feed it to a JSON schema validator.
Config migration. Moving from a YAML-based system to a JSON-based one.
Data processing. JSON parsers exist in every language and are typically faster and more predictable than YAML parsers.
YAML vs JSON: the trade-offs
YAML is easier for humans to read and edit. It supports comments. It has less visual clutter.
JSON is stricter and more predictable. Every language has a built-in parser. It’s the standard for APIs and data interchange. It doesn’t have YAML’s surprising implicit type coercion issues (the infamous Norway problem where NO becomes false).
For the reverse direction, the JSON to YAML converter is available. For formatting YAML without converting it, use the YAML Formatter.
FAQ
Multi-line strings?
Basic quoted strings are handled. Complex multi-line literals using | or > scalar indicators may have limited support.
Which YAML features work?
Key-value mappings, nested objects, arrays (block and inline), strings, numbers, booleans, null, inline objects, quoted strings.
Can I choose JSON indentation?
Yes, 2-space or 4-space. Two spaces is the common convention.
Invalid YAML?
Error message with details about where parsing failed.
Client-side?
Yes, your data never leaves your browser. Safe for configs with secrets.