Free YAML to JSON ConverterConvert YAML ↔ JSON instantly with indent options, copy support, and private client-side processing.

What is a YAML to JSON converter?

A YAML to JSON converter transforms human-friendly YAML into structured JSON that APIs, web apps, and many developer tools expect. The reverse direction turns JSON payloads into YAML that is easier to edit in config files and documentation.

Both formats represent the same data model—objects, arrays, strings, numbers, and booleans—so conversion preserves structure while changing syntax and whitespace.

Why convert between YAML and JSON?

Teams often keep configs in YAML for readability, then need JSON for HTTP APIs, JavaScript apps, or tooling that only accepts JSON. Converting locally avoids round-trips through scripts or temporary files.

Use 2-space or 4-space indentation to match your project style, then copy the result into pull requests, manifests, or test fixtures.

How to use this converter

1. Choose YAML → JSON or JSON → YAML (or swap direction).
2. Paste your input into the left panel.
3. Select indent size and click Convert.
4. Copy the output or fix any validation errors shown.

Privacy-first by default

All parsing and serialization happen in your browser. No YAML or JSON is uploaded, stored remotely, or used for training.

Frequently Asked Questions

What is YAML to JSON conversion used for?

YAML to JSON conversion is commonly used when moving configuration between tools that prefer different formats, such as Kubernetes manifests, CI configs, API payloads, and application settings.

Does this tool upload my data?

No. Conversion runs fully in your browser. Your YAML and JSON stay on your device and are never uploaded to a server.

Can I convert JSON back to YAML?

Yes. Switch the direction to JSON → YAML (or use Swap direction) to convert JSON into readable YAML with your chosen indentation.