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JSON ↔ YAML Converter

Convert between JSON and YAML as you type. Supports flow style, no-refs, custom indent. Runs 100% in your browser — your config files never leave the page.

All tools

JSON

YAML

JSON indent: Flow style (compact) No anchors (&) / aliases (*)

Conversion runs 100% in your browser — your config files never leave the page.

When to use this

Reading unfamiliar YAML: docker-compose, Kubernetes manifests, GitHub Actions — convert to JSON to see the structure clearly.
Format conversion: an API returns JSON but you want to commit a clean .yaml file — convert in seconds.
Learn YAML syntax: paste familiar JSON, see how YAML represents the same data.
Validate config files: the tool surfaces syntax errors when conversion fails.

JSON vs YAML — which to use?

JSON: APIs, web data exchange, native browser parsing, no comments.
YAML: config files (DevOps), human-friendly, supports comments (#), less syntactic noise than JSON.
Both represent the same data — round-tripping is lossless (except comments).

Key options

Flow style: write compact YAML that looks like JSON — {name: AI, version: 4.7}.
No anchors / aliases: avoids YAML & and *, easier to read but longer if data repeats.
Indent: 2 (default, JS/Python style), 4 (sometimes required by PEP-8), Tab.