JSON ↔ YAML Converter

What Is the JSON ↔ YAML Converter?

The JSON ↔ YAML Converter is a free browser-based tool that converts between JSON and YAML formats instantly. Built entirely with JavaScript, it processes your data locally — no configurations, API keys, or file contents are ever uploaded to a remote server. The tool supports bidirectional conversion: paste JSON to get formatted YAML, or paste YAML to get compact JSON. Adjustable indent (2 or 4 spaces) lets you match your project style guide. Perfect for DevOps engineers working with Kubernetes manifests, Docker Compose files, CI/CD pipelines, and configuration management.

Who Should Use This Tool?

DevOps engineers convert Kubernetes manifests between JSON and YAML during debugging and deployment. Backend developers switch between API responses (JSON) and configuration files (YAML) without manual editing. Full-stack developers working with Docker Compose, Ansible playbooks, GitHub Actions workflows, and other YAML-based configs find this tool invaluable. Open-source contributors convert between formats when submitting PRs to projects with different config style preferences. Privacy-conscious teams prefer this tool because configuration files containing secrets, database URLs, and API keys never leave the browser.

How to Use the JSON ↔ YAML Converter

Select the conversion direction using the JSON → YAML or YAML → JSON buttons. Paste your JSON or YAML content into the input panel. Choose indent size (2 or 4 spaces). Click Convert to generate the output. Use Copy to transfer results to your clipboard, or Swap to feed the output back as input for reverse conversion. The tool handles nested objects, arrays, multiline strings, and all standard YAML features. All processing happens in your browser — close the tab and your data is gone.