yaml → json

YAML to JSON Converter

Paste YAML on the left, get clean, valid JSON on the right. It all runs in your browser, so nothing is uploaded.


  


  

    
Now bring this data to life →

    
Turn this JSON into a live mock REST API you can call from your app, then make it fail on purpose to test your error handling.

    Mock this as a live API
  






  
How to convert YAML to JSON

  
Paste or type your YAML, click Convert to JSON, and copy the result. The converter uses a standard YAML 1.1/1.2 parser, so anchors, nested maps, and lists all convert correctly. Everything happens locally in your browser, so your data never leaves your machine.

  
Is my data sent to a server?
No. The conversion runs entirely client-side in your browser. Nothing is uploaded or stored.

  
What YAML features are supported?
Standard YAML including nested mappings, sequences, multi-line strings, and anchors/aliases. Invalid YAML shows a clear error message pointing at the problem.

  
Can I turn the JSON into a working API?
Yes, and that's what makes RestSimulator different. Hit "Mock this as a live API" and your JSON becomes a real endpoint you can call, with the ability to simulate latency, errors, and rate limits.