YAML ↔ JSON Converter
Convert between YAML and JSON instantly. Your data stays in your browser.
About YAML & JSON Conversion
YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files (Docker Compose, Kubernetes, GitHub Actions, Ansible).
JSON (JavaScript Object Notation) is the standard data interchange format used by APIs, databases, and web applications.
This tool converts between the two formats instantly in your browser. Your data never leaves your device — all processing happens client-side using the yaml library.
Frequently Asked Questions
How do I convert YAML to JSON?▼
Paste your YAML into the input field and click 'Convert'. The JSON output will appear instantly. You can choose between 2-space or 4-space indentation. All conversion happens in your browser — no server upload needed.
Can I convert JSON to YAML?▼
Yes! Click the swap button to switch to 'JSON → YAML' mode. Paste your JSON, click Convert, and get clean YAML output with proper indentation and formatting.
Does this support Kubernetes/Docker YAML?▼
Yes. This tool uses the standard YAML 1.2 parser and handles all valid YAML including nested objects, arrays, multi-line strings, comments, anchors, and aliases — all the features used in Kubernetes manifests, Docker Compose files, and GitHub Actions workflows.
Are YAML comments preserved in JSON?▼
No. JSON does not support comments, so YAML comments are removed during conversion. When converting JSON back to YAML, you'll need to re-add comments manually.
Is my data safe?▼
Absolutely. This tool runs 100% in your browser using the yaml JavaScript library. Your YAML and JSON data never leaves your device — no data is sent to any server.
What's the difference between YAML and JSON?▼
Both are data serialization formats. YAML is more human-readable (uses indentation, supports comments) and is preferred for config files. JSON is more machine-friendly (stricter syntax, widely supported by APIs). They can represent the same data structures.