Playground

Write MSN, see JSON output in real time — powered by the same compiler as @madsn/parser.

MSN is 25% smaller than the JSON output

input.msnMSN

280 chars19 lines~52 tokens

output.jsonJSON

{
  "app": {
    "name": "my-app",
    "version": "1.0.0",
    "debug": false
  },
  "server": {
    "host": "0.0.0.0",
    "port": 3000,
    "ssl": {
      "enabled": true,
      "cert": "/path/to/cert.pem"
    }
  },
  "database": {
    "driver": "postgres",
    "host": "db.example.com",
    "port": 5432
  },
  "features": [
    "auth",
    "api",
    "logging"
  ]
}

371 chars25 lines~28 tokens

MSN Characters

280

input

JSON Characters

371

output

Char Savings

25%

MSN vs JSON

Token Savings

—

approx. estimate

Quick Reference

- keyContainer (object)

-- key: valueKey-value pair

--- keyNested container

-- * itemArray element (scalar)

-- *Array element (object)

-- key: |Multiline block (preserves newlines)

-- key: >Multiline folded (joins lines)

# commentFull-line comment

-- key: value # cInline comment (space before #)

-- on: trueBoolean (true / false)

-- port: 3000Integer

-- pi: 3.14Float

-- x: nullNull

-- k: "hello"Quoted string