YAML to JSON

YAML → JSON · resolves anchors · YAML 1.2

Paste YAML, get JSON. Anchors and aliases are resolved. The reverse direction is at JSON → YAML. YAML 1.2 first-class; for older 1.1 inputs with the Norway problem (NO → false), wrap such values in quotes before pasting.

Input YAML

JSON output

Paste YAML.

How to convert YAML to JSON

Paste in either panel — the tool auto-detects direction.
Output appears in the opposite panel live. The Swap button flips them, useful for round-tripping.
YAML output options: Block style (default — readable), Flow style (compact, JSON-like), Quote style (auto / single / double).
Copy or Download as .yaml / .yml / .json.

Common pitfalls

Anchors and references — resolved into JSON (which has no equivalent). Round-tripping back to YAML inlines them.
Multiple documents (--- separators) — JSON has no document concept; only the first is parsed. Use NDJSON for streams.
Complex keys (objects as keys) — JSON disallows; the tool reports an error.

FAQ

Is YAML 1.1 supported?

The parser is YAML 1.2 — most 1.1 docs parse fine, but the Norway problem and the !!str / !!int tag handling differ. If a 1.1 doc fails, quote ambiguous scalars.

What about comments?

JSON has no comments. They're stripped during conversion. Use the round-trip back to YAML to re-author with comments.

Will it work offline?

Yes.