JSON ↔ YAML converter
Convert JSON to YAML or YAML to JSON on one private browser page. Supports nested objects and arrays without uploads.
Paste either format, then choose a direction.
Private · browser only
Your data stays in this browser. Nothing is uploaded.
Conversion directions
Direction 01
JSON to YAML
Convert JSON configuration into readable YAML.
Direction 02
YAML to JSON
Parse YAML configuration into formatted JSON.
About this converter
How JSON maps to YAML
YAML is a superset of JSON, so every valid JSON document is also valid YAML. This converter turns JSON braces and brackets into clean YAML indentation, producing configuration that is easier to read and edit by hand for Kubernetes manifests, CI pipelines and application settings.
Nested objects become indented mappings, arrays become dash-prefixed list items, and strings are emitted without quotes whenever it is safe to do so.
YAML formatting conventions
The output uses two-space indentation and folds long JSON onto readable lines. Keys keep their original order, and null values render as the bare word null. Booleans and numbers are typed exactly like JSON, so types round-trip correctly when you convert back.
Choosing YAML for configuration
YAML shines for human-edited configuration because it supports comments, multiline strings and anchors, which JSON does not. Converting JSON to YAML lets you take machine-generated configuration and add documentation and structure before committing it to a repository.
Frequently asked questions
Can I convert YAML back to JSON here?
Yes. Enter YAML in its editor and use the YAML-to-JSON direction button on this same canonical page.
Does this JSON YAML converter upload my configuration?
No. Parsing and serialization run entirely inside your browser.
Is YAML a superset of JSON?
Yes. Every valid JSON document is also valid YAML, which is why conversion between them is lossless and reversible.
Does it preserve key order?
Yes. Keys keep their original order from the JSON, so the YAML output matches your source document structure.
Can YAML have comments?
Yes, YAML supports comments with # while JSON does not. Converting JSON to YAML lets you add documentation to machine-generated configuration.
Does it handle nested objects and arrays?
Yes. Nested objects become indented mappings and arrays become dash-prefixed list items, preserving the full hierarchy.