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YAML ↔ JSON Converter

Convert YAML to JSON or JSON to YAML instantly. Supports multi-document YAML (separated by ---), nested objects, arrays, all scalar types, and pretty-print. Everything runs in your browser — no data sent to servers.

✓ Multi-document YAML support ✓ Syntax error highlighting ✓ Runs 100% in your browser

Frequently Asked Questions

What is YAML and why convert it to JSON?▼

YAML is a human-readable format popular for config files (Docker Compose, Kubernetes, GitHub Actions). JSON is the standard for APIs and data interchange. Converting between them is a daily task for developers working across multiple ecosystems.

Does this tool support multi-document YAML?▼

Yes. Separate multiple YAML documents with --- on its own line. Each document is converted independently and labeled in the output. This is common in Kubernetes manifests and Ansible playbooks.

How do I convert JSON back to YAML?▼

Click the 'JSON → YAML' button to switch direction. Paste your JSON and the tool converts it to clean, indented YAML with proper scalar quoting.

What YAML types are supported?▼

The converter handles strings, numbers, booleans (true/false/yes/no/on/off), null (~), nested objects, arrays, and block scalars (| and >). Inline JSON arrays/objects inside YAML are also parsed.

Is my data sent to any server?▼

No. All conversion happens entirely in your browser with JavaScript. Your YAML and JSON data never leaves your machine — safe to use with sensitive config files and secrets.

What is the difference between pretty print and minified JSON?▼

Pretty print formats JSON with indentation and line breaks for human readability. Minified JSON removes all whitespace, producing the most compact representation — ideal for network transmission and storage. This tool outputs pretty-printed JSON by default.

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