YAML ↔ JSON Converter
Convert between YAML and JSON bidirectionally with validation and error highlighting.
About this tool
YAML is the de-facto standard for configuration files in Docker, Kubernetes, GitHub Actions, and CI/CD pipelines. JSON is the lingua franca of web APIs. This converter lets you switch between the two instantly with syntax validation, error reporting, and a clean side-by-side layout. All processing stays in your browser.
How to use the YAML ↔ JSON Converter
- Choose the direction: YAML → JSON or JSON → YAML
- Paste your input (YAML or JSON) in the left pane
- Click Convert to get the formatted output
- Copy the result to your clipboard with one click
- If there are syntax errors, they will be shown in red next to the output label
Features
- Bidirectional conversion (YAML ↔ JSON)
- Validation with precise error messages
- Auto-convert on button click — no auto-flash
- Copy output to clipboard
- Works offline, 100% client-side
Frequently asked questions
Is this YAML to JSON converter free?
Yes. Convert between YAML and JSON bidirectionally for free with no signup required.
Does it validate YAML and JSON?
Yes. The tool validates syntax and shows precise error messages with line numbers if the input is invalid.
Can I use it for Docker or Kubernetes files?
Yes. It handles any valid YAML, including Docker Compose and Kubernetes manifests, converting them to JSON and back.
Is my data sent to a server?
No. All conversion happens locally in your browser. Your data never leaves your machine.