NerdBible
Sign in

Tools

More
All toolsSecurity & PrivacyImagePDF & DocumentsTextDeveloperColour & CSSWeb & SEOCalculators
More
JSON Formatter & ValidatorJSON ↔ YAML ConverterJSON ↔ XML ConverterJSON ↔ CSV ConverterJSON to TypeScriptMock JSON GeneratorCSV ViewerCode Formatter & MinifierMarkdown ↔ HTMLRegex TesterBase64 Encode & DecodeURL Encode & DecodeURL ParserHTML Entity Encode & DecodeJWT DecoderUUID & ULID GeneratorUnix Timestamp ConverterCron Expression ExplainerNumber Base ConverterChmod CalculatorIP Subnet CalculatorHTTP Status Codes

JSON ↔ YAML Converter

Convert between JSON and YAML.

Free. Runs in your browser: nothing you enter or open is uploaded.

YAML

  

  

    
    
  

  
  




Converted in your browser with js-yaml (MIT licence). YAML comments, anchors and custom tags have no JSON equivalent, so comments are dropped and anchors are written out in full. A YAML file with several documents separated by --- becomes a JSON array.



  
How to use it

  
  1. Pick the direction: JSON to YAML or YAML to JSON.
  2. Paste your data. The conversion updates as you type and points to the line of any error.
  3. Copy or download the result, or press Swap to convert it back.





  
Questions

  
Is every JSON file valid YAML?
Almost. YAML 1.2 was designed as a superset of JSON, so JSON can be read as YAML. Converting to proper YAML style just makes it shorter and easier to read.
Why did a value like no or 1.10 change?
YAML guesses types for unquoted values. This converter follows YAML 1.2, where only true and false are booleans, but tools built on the older YAML 1.1 read yes and no as booleans too. Quote values you need kept as text.
What happens to YAML comments?
JSON has no comments, so they are dropped when converting to JSON and cannot come back on the way to YAML.
Is my data uploaded?
No. The conversion runs in your browser, which matters for configuration files that hold hostnames or keys.