JSON to YAML Converter — Free Online
Paste JSON data or drop a .json file to instantly convert it to clean, readable YAML. Perfect for creating configuration files. Runs entirely in your browser — nothing is uploaded.
What This Tool Does
The JSON to YAML converter takes JSON data and transforms it into clean, properly indented YAML. YAML (YAML Ain't Markup Language) is a human-friendly data serialization format used extensively for configuration files across the DevOps ecosystem — Kubernetes, Docker Compose, GitHub Actions, Ansible, and more.
Converting JSON to YAML is useful when you have structured data from an API, database export, or programmatic source that needs to become a human-readable configuration file.
How to Use the Converter
- Paste your JSON text into the input area, or drag-and-drop a .json file
- Click Convert to YAML to get clean, indented YAML output
- Adjust indentation (2 or 4 spaces) and quoting style using the options
- Click Sort Keys & Convert to alphabetically sort all object keys
- Click Copy or Download to export the result as a .yaml file
Why Convert JSON to YAML?
- Readability — YAML's indentation-based syntax is easier to scan than JSON's braces and brackets
- Configuration files — most DevOps tools require YAML: Kubernetes manifests, Docker Compose, CI/CD pipelines
- Comments — after conversion, you can add comments (#) to document your configuration
- Cleaner diffs — YAML produces more readable Git diffs than JSON for configuration changes
- No quoting overhead — YAML doesn't require quotes around most keys and string values
- Multi-document support — YAML supports multiple documents in a single file using --- separators
JSON to YAML Type Mapping
| JSON Type | YAML Equivalent | Example |
|---|---|---|
| Object {"key": "val"} | Mapping | key: val |
| Array ["a", "b"] | Sequence | - a - b |
| String "hello" | Unquoted or quoted scalar | hello |
| Number 42 | Integer scalar | 42 |
| Number 3.14 | Float scalar | 3.14 |
| Boolean true/false | Boolean | true / false |
| null | Null | null or ~ |
Common Use Cases
- Kubernetes — convert JSON pod/service definitions to YAML manifests for kubectl apply
- Docker Compose — transform JSON service definitions into docker-compose.yml format
- GitHub Actions — create workflow files from JSON-structured CI/CD configuration
- Ansible — generate playbooks and inventory files from JSON data sources
- Terraform — convert JSON variable definitions to YAML format for tfvars
- API documentation — convert JSON schemas or OpenAPI specs to readable YAML format
Privacy & Security
All JSON parsing and YAML generation runs locally in your browser using JavaScript. No data is sent to any server. This is critical when converting data that may contain API keys, credentials, tokens, or other sensitive values.
💡 Need to go the other direction? Use the YAML to JSON converter to parse YAML into JSON. You can also format your JSON before converting, or validate it to catch errors first.
Related Guides & Tutorials
JSON to YAML: Practical Guide
Syntax differences, gotchas, and worked examples for config files.
GuideJSON Formatter: Complete Guide
How to format, validate, and debug JSON data.
GuideJSON vs XML vs CSV
Choosing the right data format for your use case.
Tool⇄ YAML to JSON
Convert YAML data to JSON format.
JSON & YAML Workflow Tools
- Convert YAML to JSON — go the other direction, from YAML back to JSON
- Format JSON — beautify and validate your JSON before converting
- Validate JSON — check for syntax errors before conversion
- Convert JSON to CSV — transform JSON arrays into spreadsheet format
- Convert JSON to XML — for systems that require XML