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String Generator

Generates random strings with configurable length and character sets.

Basic Usage​

{
  "code": {"gen": "string"}
}

Output: Random alphanumeric string (default length 1-20 characters)

Options​

OptionTypeDefaultDescription
lengthinteger-Exact string length (overrides min/max)
minLengthinteger1Minimum length
maxLengthinteger20Maximum length
allowedCharsstringalphanumericCharacters to use
regexstring-Regex pattern to generate from (overrides other options)

Examples​

Fixed Length​

{
  "code": {"gen": "string", "length": 10}
}

Output: Exactly 10 characters (e.g., aB3xK9mP2q)

Variable Length​

{
  "description": {"gen": "string", "minLength": 5, "maxLength": 15}
}

Output: Between 5 and 15 characters

Custom Characters​

{
  "hexCode": {"gen": "string", "length": 6, "allowedChars": "0123456789ABCDEF"}
}

Output: 6-character hex string (e.g., A3F2B9)

Uppercase Only​

{
  "code": {"gen": "string", "length": 8, "allowedChars": "ABCDEFGHIJKLMNOPQRSTUVWXYZ"}
}

Numbers Only​

{
  "pin": {"gen": "string", "length": 4, "allowedChars": "0123456789"}
}

Output: 4-digit PIN (e.g., 7392)

Regex Pattern​

{
  "productCode": {"gen": "string", "regex": "[A-Z]{3}-[0-9]{4}"}
}

Output: Pattern like ABC-1234

License Plate​

{
  "licensePlate": {"gen": "string", "regex": "[A-Z]{2}[0-9]{2}[A-Z]{3}"}
}

Output: Pattern like AB12XYZ

Common Patterns​

Product Codes​

{
  "products": {
    "count": 100,
    "item": {
      "id": {"gen": "uuid"},
      "sku": {"gen": "string", "regex": "[A-Z]{3}-[0-9]{5}"},
      "barcode": {"gen": "string", "length": 13, "allowedChars": "0123456789"}
    }
  }
}

Access Codes​

{
  "accessCodes": {
    "count": 50,
    "item": {
      "id": {"gen": "uuid"},
      "code": {"gen": "string", "length": 8, "allowedChars": "ABCDEFGHJKLMNPQRSTUVWXYZ23456789"},
      "pin": {"gen": "string", "length": 6, "allowedChars": "0123456789"}
    }
  }
}

Tracking Numbers​

{
  "shipments": {
    "count": 200,
    "item": {
      "id": {"gen": "uuid"},
      "trackingNumber": {"gen": "string", "regex": "[A-Z]{2}[0-9]{9}[A-Z]{2}"}
    }
  }
}

Voucher Codes​

{
  "vouchers": {
    "count": 1000,
    "item": {
      "id": {"gen": "uuid"},
      "code": {"gen": "string", "length": 12, "allowedChars": "ABCDEFGHJKLMNPQRSTUVWXYZ23456789"}
    }
  }
}

Color Codes​

{
  "colors": {
    "count": 50,
    "item": {
      "id": {"gen": "uuid"},
      "hex": {"gen": "string", "length": 6, "allowedChars": "0123456789ABCDEF"}
    }
  }
}

Best Practices​

  1. Use Regex for Patterns: Regex is powerful for specific formats
  2. Exclude Ambiguous Characters: For codes, exclude O/0, I/1, etc.
  3. Fixed Length for Codes: Use length for consistent code formats
  4. Appropriate Character Sets: Match your use case (hex, alphanumeric, etc.)
  5. Consider Readability: For user-facing codes, avoid confusing characters

Regex Patterns​

Common regex patterns:

// Product code: ABC-1234
{"regex": "[A-Z]{3}-[0-9]{4}"}

// Phone format: (123) 456-7890
{"regex": "\\([0-9]{3}\\) [0-9]{3}-[0-9]{4}"}

// Date format: 2024-01-15
{"regex": "20[0-9]{2}-[0-1][0-9]-[0-3][0-9]"}

// Hex color: #A3F2B9
{"regex": "#[0-9A-F]{6}"}

// Email-like: user123@domain.com
{"regex": "[a-z]{4,8}[0-9]{1,3}@[a-z]{5,10}\\.com"}

Next Steps​