100% on-device

YAML ↔ JSON

Convert YAML to JSON and back. Scalars follow the YAML 1.2 core schema, and anything a YAML 1.1 parser would read differently — the Norway problem — is called out rather than silently decided.

Runs entirely in this tab. What you paste is never sent anywhere.

YAML

Paste, type, or drop a file (yaml, yml, txt).

JSON

Scalars are read with the YAML 1.2 core schema, so NOis the string “NO”. YAML 1.1 parsers read it as false — the Norway problem — so anything ambiguous raises a note rather than being decided for you. Unsupported constructs are refused by name instead of being guessed at.