Generate Random String

This service task generates a random string with configurable character sets and length. It uses Node.js crypto.randomBytes for cryptographically secure randomness.

Benefit: Tokens, reference codes, temporary passwords, or unique identifiers can be generated directly within a process — no external tools required.

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Input Parameters

Parameter	Type	Required	Description
length	Number	No	Length of the random part (excluding prefix/suffix). Default: 16. Maximum: 1024.
numbers	Boolean	No	Include digits (0–9). Default: true.
characters	Boolean	No	Include letters (a–z, A–Z). Default: true.
specialSigns	Boolean	No	Include special characters (!@#$%^&*…). Default: false.
uppercase	Boolean	No	Include uppercase letters (only relevant if characters is false). Default: true.
prefix	String	No	Fixed prefix prepended to the result.
suffix	String	No	Fixed suffix appended to the result.

Example Input

{
  "length": 24,
  "numbers": true,
  "characters": true,
  "specialSigns": false,
  "prefix": "REF-"
}

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Output

Field	Type	Description
result	String	The generated random string (including prefix/suffix).
length	Number	Total length of the result string.
config	Object	The character set configuration that was applied.

Example Output

{
  "result": "REF-aX7kQ9mB2nR4wL6pY8vT3j",
  "length": 28,
  "config": {
    "numbers": true,
    "characters": true,
    "specialSigns": false,
    "uppercase": true
  }
}

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Behaviour

• If all character type flags are set to false, lowercase letters are used as a fallback.
• The prefix and suffix are not counted towards the length parameter — length only controls the random part.
• Randomness is generated using crypto.randomBytes, making it suitable for security-relevant use cases.

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Use Cases

• Reference codes: Generate unique order or ticket IDs like ORD-aX7kQ9mB.
• Temporary passwords: Create initial passwords for user provisioning.
• API tokens: Generate bearer tokens or API keys within a workflow.
• File names: Create unique, collision-free file identifiers.
• Verification codes: Generate numeric-only codes for SMS/email verification.