YAML Converter & Validator
Convert JSON and YAML in both directions, and validate YAML syntax
Enter input and click Convert
All processing happens locally in your browser. No data is sent to any server.
About YAML Converter
Convert between YAML and JSON formats with validation feedback. YAML is a human-readable data serialisation language commonly used for configuration files (Docker Compose, Kubernetes manifests, CI/CD pipelines, Ansible playbooks) and data exchange. This converter lets you paste YAML and get valid JSON, or paste JSON and get clean YAML output. It validates your input and reports syntax errors with details. Key sorting is available for deterministic output. All conversion runs locally in your browser.
How to Use YAML Converter
- Paste YAML to convert it to JSON, or paste JSON to convert it to YAML.
- Select the conversion direction using the mode toggle.
- Optionally enable key sorting for deterministic output.
- Copy the converted result using the copy button.
YAML Converter FAQ
Can I convert YAML to JSON and JSON to YAML?
Yes. Conversion works in both directions with real-time validation and error feedback.
Can I sort keys during conversion?
Yes. Key sorting produces alphabetically ordered output, which is useful for consistent diffs and version control.
Which YAML features are supported?
The converter supports standard YAML features including nested objects, arrays, multi-line strings, anchors, and aliases. It uses the yaml library for parsing.
Will YAML syntax errors be reported?
Yes. Invalid YAML input produces specific error messages with line numbers to help you locate and fix the issue.
Is my configuration data sent to a server?
No. All conversion and validation happens locally in your browser. Your YAML and JSON data never leaves your device.