YAML ↔ JSON Converter
Convert YAML to JSON and back. Powered by js-yaml in your browser — no upload required.
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What is YAML to JSON Conversion?
YAML and JSON are both human-readable data serialisation formats with different syntax. YAML uses indentation and colons; JSON uses braces, brackets, and quoted strings. Converting between them is a common task when working with Kubernetes configs, CI/CD pipelines, OpenAPI specs, and Helm charts.
How to convert YAML to JSON online
- Paste your YAML or JSON into the Input panel.
- Choose the direction: YAML to JSON or JSON to YAML.
- The converted output appears instantly in the Output panel.
- Click Copy or Download to save the result.
Frequently Asked Questions
What is the difference between YAML and JSON?
YAML is a superset of JSON — all valid JSON is also valid YAML. YAML supports comments (JSON does not), uses indentation instead of braces, and allows multi-line strings more naturally. JSON is more strictly typed and universally supported across programming languages.
Can every YAML document be converted to JSON?
Most YAML can be converted to JSON, but some YAML features have no JSON equivalent — comments and anchors are lost in conversion. Sequences and mappings convert cleanly.
Why convert YAML to JSON?
JSON is the standard for REST APIs and is natively supported in JavaScript, Python, Go, and virtually every language. You might convert YAML configs to JSON for programmatic processing, or convert JSON API responses to YAML for more readable config files.
Does this tool support multi-document YAML?
The tool handles single YAML documents. If your YAML file contains multiple documents separated by ---, you will need to split them first.