Free YAML to JSON Converter

Convert YAML configuration into JSON in one click. Mappings, nested structures, sequences, and lists of mappings are all parsed — with typed scalars (numbers, booleans, nulls) preserved — so your configs translate faithfully.

JSON output


    

    

  



  
Private by design. This tool runs 100% in your browser — your code is never uploaded to any server.

  

    
How to Use the YAML to JSON

    
    
      
  1. Paste your YAML into the input box.
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  2. Click Convert to JSON — the JSON appears instantly.
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  3. Check the structure stats to confirm the parse.
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  4. Copy or download the JSON.
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Features

    
The parser handles nested mappings, sequences, and lists of mappings with correct indentation-based scoping, plus typed scalars: integers, floats, booleans, and nulls convert to real JSON types instead of strings. Quoted scalars keep their exact text, structural errors report line numbers, and output is pretty-printed JSON.

    
Benefits & Use Cases

    
DevOps engineers convert Helm values and CI configs to JSON for tools that require it; developers translate YAML fixtures into JSON test data; anyone migrating between config formats skips writing a throwaway script. Local parsing keeps infrastructure configs private.

    
Tips

    
YAML 1.1 treats values like “yes” and “on” as booleans — this tool only converts explicit true/false to avoid surprises. If a value must stay a string, quote it in the YAML source.

  

  

    
Frequently Asked Questions

    
How are YAML types mapped to JSON?
Mappings become objects, sequences become arrays, and scalars keep their types: numbers stay numeric, true/false stay boolean, null stays null. Quoted values are always strings.

    
What YAML features are supported?
Nested mappings, sequences, lists of mappings, and common scalars. Anchors, aliases, merge keys, and multi-line block scalars have limited support — simplify those before converting.

    
Why did my value become a different type?
Unquoted scalars are type-guessed: 8080 becomes a number, true becomes boolean. Quote any value (“8080”) to force it to stay a string.

    
Can I convert JSON back to YAML?
Use the YAML formatter on this site: paste the JSON-equivalent structure and it emits clean YAML (JSON is valid YAML, so conversion is straightforward).

    
Is my YAML uploaded anywhere?
No. Parsing and conversion run entirely in your browser — your data never leaves your device.

  

  

    
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