JSON to YAML Converter
Convert between JSON and YAML instantly in your browser. No data is sent to any server — everything runs client-side.
How It Works
Paste or type JSON in the left editor and YAML appears instantly on the right — or type YAML on the right and get JSON on the left. The conversion is bidirectional: edit either side and the other updates in real time.
All processing happens in your browser using JavaScript. Your data never leaves your device, making this safe for config files, API responses, and sensitive data.
Features
- Bidirectional conversion — JSON to YAML or YAML to JSON, edit either panel
- Live syntax validation — errors are highlighted as you type
- Dark mode — toggle with the button in the header, or auto-detected from your system
- Copy & download — one-click copy to clipboard or download as a file
- Configurable indentation — choose 2 spaces, 4 spaces, or tabs for JSON
- Batch conversion — convert multiple files at once with ZIP download on the batch page
- 100% client-side — no data is uploaded anywhere
When to Use JSON vs YAML
JSON is the standard for APIs, config files, and data exchange. It's strict, widely supported, and easy to parse. Use JSON when you need machine readability and interoperability.
YAML is popular for configuration files (Docker Compose, Kubernetes, GitHub Actions, Ansible). It's more human-readable, supports comments, and is less verbose. Use YAML when humans need to read and edit the file frequently.
Common Use Cases
- Converting API responses (JSON) to Kubernetes config (YAML)
- Transforming Docker Compose files between formats
- Converting GitHub Actions workflow files
- Migrating configuration between tools that use different formats
- Debugging and inspecting data structures in a readable format