Convert between YAML and JSON formats with validation. Free, private, runs in your browser.
100% private — your files never leave your browser. All processing happens locally on your device.
YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files in DevOps, Kubernetes, Docker Compose, CI/CD pipelines, Ansible, and many other tools. JSON (JavaScript Object Notation) is the standard data interchange format for APIs and web applications. Converting between YAML and JSON is a daily task for developers and DevOps engineers working across different systems and tools.
Different tools require different formats. Kubernetes manifests use YAML, but the Kubernetes API returns JSON. Docker Compose uses YAML, but many programming languages parse JSON more easily. CI/CD tools like GitHub Actions use YAML, but webhook payloads arrive as JSON. This tool lets you quickly convert between the two formats, validate your YAML syntax, and catch errors before deploying configuration changes to production.
The tool uses js-yaml, the most widely-used YAML parser for JavaScript, to parse and generate YAML with full specification compliance. It supports multi-document YAML files (separated by ---), handles all YAML types including anchors and aliases, and provides detailed error messages with line numbers when your YAML has syntax issues. You can configure indentation, sort keys alphabetically, and choose between block and flow output styles for YAML generation.
Yes. All processing happens locally in your browser. Configuration files often contain secrets, API keys, and infrastructure details — none of that data leaves your device. This tool is safe to use with production configuration files.
Yes. Click the direction toggle to switch between YAML→JSON and JSON→YAML. Both directions are supported.
Yes. If your YAML has syntax errors, the tool displays the error with the exact line number so you can fix it quickly.
Multi-document YAML files (separated by ---) are supported. Each document is converted to a separate JSON object in an array.
Absolutely. All processing happens in your browser. Your configuration data never leaves your device.