YAML to JSON

About This Tool

The YAML to JSON Converter transforms YAML configuration files and data documents into equivalent JSON. Indented mappings become JSON objects, dash-prefixed sequences become arrays, and unquoted scalars are automatically typed (numbers, booleans, and null are inferred).

This is a lightweight browser-based parser that handles the most common YAML patterns. Complex YAML features like anchors (&), aliases (*), block scalars (|, >), and multi-document files are not supported. All processing runs locally in the browser.

How to Use

1. Paste your YAML into the YAML Input area, or click Sample to load an example.
2. Choose the JSON indent level (2 spaces, 4 spaces, or Minified).
3. Click → JSON to convert.
4. Click Copy to copy the JSON output to your clipboard.

Use Cases

Developers convert YAML configuration files (CI/CD pipelines, Kubernetes manifests, Docker Compose) to JSON for use with APIs or JavaScript applications. Data engineers transform YAML data files to JSON for pipeline ingestion. Frontend developers convert YAML-based mock data to JSON for testing.

FAQ

• What YAML types are automatically converted? — null/~ → null, true/false → boolean, numbers → number. Quoted strings are unquoted. Everything else remains a string.
• Why doesn't my YAML convert correctly? — Complex features like YAML anchors (&), aliases (*), and multi-document files (---) are not supported. Use a server-side parser for those.
• Is my data sent to a server? — No. All conversion runs locally in the browser using a JavaScript parser. Nothing is transmitted to a server.