Free JSON to YAML Converter Online
Convert between JSON and YAML formats instantly.
About JSON and YAML
JSON (JavaScript Object Notation) and YAML (YAML Ain't Markup Language) are two of the most popular data serialization formats. JSON uses braces and brackets with strict quoting rules. YAML uses indentation and is designed to be more human-readable, making it popular for configuration files.
Both formats can represent the same data structures: objects (mappings), arrays (sequences), strings, numbers, booleans, and null. This tool converts between them in either direction with no data loss. All processing happens locally in your browser.
Common Uses
- Convert API responses (JSON) to Kubernetes/Docker configs (YAML)
- Convert YAML CI/CD configs to JSON for programmatic editing
- Migrate configuration between tools that use different formats
- Make JSON data more readable by converting to YAML
- Prepare YAML data for APIs that only accept JSON
- Compare data structures when debugging format mismatches
Frequently Asked Questions
Is any data lost during conversion?
No. JSON and YAML represent the same data types, so converting between them is lossless for standard structures (objects, arrays, strings, numbers, booleans, null). YAML-specific features like anchors and custom tags are not supported.
Does this support comments in YAML?
YAML supports comments (lines starting with #) but JSON does not. When converting YAML to JSON, comments are naturally stripped since JSON has no comment syntax. When converting JSON to YAML, no comments are added.
What YAML features are supported?
This tool supports standard YAML: mappings (key-value pairs), sequences (arrays), quoted and unquoted strings, numbers, booleans (true/false), null, multi-line strings, and nested structures. Advanced features like anchors (&/*), tags (!!), and merge keys are not supported.