YAML to JSON

Convert YAML into clean, structured JSON instantly.


    

  

  

    
    
    
    
  

  


    

    

      
ToolsSoup's YAML to JSON converter is a free online tool that turns YAML into clean, structured JSON right in your browser. Paste a config file or any YAML document and get back valid, indented JSON — with numbers, booleans, and null detected automatically. No uploads, no sign-up, and nothing ever leaves your device.

      

        
What is a YAML to JSON converter?

        
A YAML to JSON converter parses YAML — a human-friendly format common in config files — and re-emits the same data as JSON, the format that JavaScript and most APIs expect. Mappings become objects, sequences become arrays, and scalar values like numbers, booleans, and null are recognized and converted to their real JSON types. It is the fastest way to move a Docker Compose, Kubernetes, GitHub Actions, or Ansible file into code that works with JSON.

        
      

      

        
How to convert YAML to JSON online

        
Converting YAML with ToolsSoup takes just a few seconds:

        
  1. Paste your YAML into the input box on the left.
  2. Click Convert for indented JSON, or Minify for compact JSON.
  3. Copy the JSON, or fix any error shown below.

      

      

        
How are YAML types mapped to JSON?

        
The converter preserves your data while switching formats: mappings become JSON objects, sequences become arrays, and plain scalars are typed automatically. A value like 42 becomes a number, true and false become booleans, and an empty value or ~ becomes null. Quoted strings stay strings, so a number wrapped in quotes is kept as text. Inline flow collections such as [a, b] and {x: 1} are supported too.

        
      

      

        
Why use this YAML to JSON converter?

        
  • 100% free with no ads, sign-up, or usage limits.
  • Runs entirely in your browser — your data is never uploaded to a server.
  • Detects numbers, booleans, and null automatically.
  • Outputs indented or minified JSON with one click.
  • Handles nested mappings, sequences, and inline flow collections.

      

      

        
Frequently asked questions

        

          
Is this YAML to JSON converter free?

          
Yes. Every tool on ToolsSoup is completely free to use, with no account, sign-up, or hidden limits.

        

        

          
Is my YAML data safe?

          
Absolutely. All conversion happens locally in your browser using JavaScript, so your YAML is never sent to or stored on any server.

        

        

          
Are numbers and booleans converted to real JSON types?

          
Yes. Unquoted values like 42, true, false, and null are converted to JSON numbers, booleans, and null. Wrap a value in quotes to keep it as a string.

        

        

          
Why am I getting an 'Invalid YAML' error?

          
The most common cause is using tabs for indentation — YAML requires spaces. Other causes are inconsistent indentation, a missing colon after a key, or an unclosed quote or flow collection. Fix the issue and try again.

        

        

          
Which YAML features are supported?

          
The converter handles the common block style — mappings, sequences, nested structures, and inline flow collections like [a, b] and {x: 1} — which covers almost all configuration files.