Practical usage guide
What this tool does
JSON and YAML can represent the same basic maps, lists, strings, numbers, booleans, and null values, but the formats are not identical. This converter is designed for everyday configuration migration and inspection, with parsing and serialization performed in the browser.
A round trip may change presentation even when the underlying data remains equivalent. YAML comments, anchors, aliases, quoting choices, and block styles are formatting or language features that JSON cannot preserve.
Quick start
Choose the source format
Select JSON to YAML for compact machine data, or YAML to JSON when an application or API requires strict JSON.
Paste one complete document
Provide a single root value. For JSON, use strict double-quoted syntax; for YAML, make indentation consistent and avoid tabs.
Review scalar types
After conversion, check values such as dates, leading-zero identifiers, yes/no strings, and nulls because YAML parsers can interpret scalars differently.
Common use cases
Move application configuration
Convert a JSON settings object into readable YAML for CI, containers, or infrastructure configuration.
Create JSON fixtures from YAML
Turn human-edited YAML test data into strict JSON that can be consumed by APIs, tests, or browser storage.
Inspect nested data
Use the alternate representation to verify list nesting, object boundaries, and accidental string values.
Limitations and important notes
Comments and style are not round-tripped
JSON has no comments, anchors, aliases, tags, or block scalar styles, so those details may disappear or be rewritten.
YAML scalar interpretation needs review
Unquoted values can be interpreted as numbers, booleans, or null depending on syntax. Quote identifiers when their exact text matters.
Conversion does not validate application semantics
A successfully converted file may still be invalid for Kubernetes, CI, or another target because their schemas are not checked here.