JSON Edge Cases JSON Dataset

Tricky JSON values: nulls, empty objects, unicode strings, deep nesting, XSS strings, large numbers. Free to use, no attribution required — copy it, download it, or open it directly in the JSON Formatter. Runs entirely in your browser.

{
  "nullValues": {
    "nullField": null,
    "undefinedAsNull": null,
    "emptyString": "",
    "zeroNumber": 0,
    "falseBoolean": false,
    "emptyArray": [],
    "emptyObject": {}
  },
  "numbers": {
    "integer": 42,
    "float": 3.14159265358979,
    "negative": -273.15,
    "zero": 0,
    "largeNumber": 9007199254740991,
    "smallFloat": 1e-9,
    "scientificNotation": 12300000000,
    "negativeScientific": -4.56e-7
  },
  "strings": {
    "empty": "",
    "singleChar": "a",
    "withSpaces": "  leading and trailing spaces  ",
    "withNewlines": "line1\nline2\nline3",
    "withTabs": "col1\tcol2\tcol3",
    "withUnicode": "Hello 世界 🌍 مرحبا",
    "withEmoji": "🎉🚀💻🔥",
    "withSpecialChars": "!@#$%^&*()_+-=[]{}|;':\",./<>?",
    "sqlInjection": "'; DROP TABLE users; --",
    "xssAttempt": "<script>alert('xss')</script>",
    "jsonInString": "{\"nested\": \"json\"}",
    "backslashes": "C:\\Users\\test\\file.txt",
    "veryLong": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
  },
  "booleans": {
    "trueValue": true,
    "falseValue": false
  },
  "arrays": {
    "empty": [],
    "singleItem": [
      1
    ],
    "mixed": [
      1,
      "two",
      true,
      null,
      {
        "key": "value"
      },
      [
        3,
        4
      ]
    ],
    "nested": [
      [
        1,
        2
      ],
      [
        3,
        4
      ],
      [
        5,
        [
          6,
          [
            7
          ]
        ]
      ]
    ],
    "withNulls": [
      1,
      null,
      2,
      null,
      3
    ]
  },
  "objects": {
    "empty": {},
    "singleKey": {
      "key": "value"
    },
    "deeplyNested": {
      "level1": {
        "level2": {
          "level3": {
            "level4": {
              "value": "deep"
            }
          }
        }
      }
    },
    "numericKeys": {
      "0": "zero",
      "1": "one",
      "2": "two"
    },
    "duplicateKeyExample": "JSON doesn't allow duplicate keys — parsers typically keep the last value"
  },
  "dates": {
    "isoDate": "2024-01-15",
    "isoDateTime": "2024-01-15T10:30:00Z",
    "isoWithMillis": "2024-01-15T10:30:00.123Z",
    "unixTimestamp": 1705314600,
    "invalidDate": "not-a-date"
  }
}