random_string

Package Overview

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A simple Flutter/Dart package for generating random ASCII strings using Dart's built-in Random class. It provides an easy-to-use API to create random strings of specified lengths, ideal for scenarios like generating temporary tokens, passwords, or identifiers. The library is lightweight and platform-agnostic, supporting all major platforms including Android, iOS, Web, macOS, Windows, and Linux. It requires no external dependencies beyond the core Dart SDK.

Use cases

Generating temporary passwords
Creating unique identifiers
Producing test data
Token generation for authentication
Simulating random input in apps

Key features

Simple API with minimal setup
Uses Dart's Random class
Supports custom length and character sets
Cross-platform compatibility
Lightweight and dependency-free

Suitable for

Developers needing quick random string generation
Testing and prototyping
Authentication and session management
Apps requiring unique IDs or codes

Considerations

Limited to ASCII characters by default
No cryptographic security guarantees
Does not support Unicode or special character customization without extension

Original README

Original README snapshot from the linked source repository. Visit the repository for the latest content.

Simple library for generating random ascii strings.

Design goals and limitations

While this package provides randomBetween for convenience, as the name implies, the design goal of this package is for random generation of ascii strings, particularly for testing and not for cryptographic purposes.
With that stated, consider an alternative means of random number generation if your needs fall outside these goals and limitations.

Usage

A simple usage example:

import 'package:random_string/random_string.dart';
import 'dart:math' show Random;

main() {
  print(randomBetween(10, 20)); // some integer between 10 and 20 where 0 <= min <= max <= 999999999999999
  print(randomNumeric(4)); // sequence of 4 random numbers i.e. 3259
  print(randomString(10)); // random sequence of 10 characters i.e. e~f93(4l-
  print(randomAlpha(5)); // random sequence of 5 alpha characters i.e. aRztC
  print(randomAlphaNumeric(10)); // random sequence of 10 alpha numeric i.e. aRztC1y32B

  var r = Random.secure();
  print(randomBetween(10, 20, provider: CoreRandomProvider.from(r))); // You can use a provider from Random.
  print(randomBetween(10, 20, provider: _Provider())); // Or you can implement your own.
}

class _Provider with AbstractRandomProvider {
  _Provider();
  double nextDouble() => 0.5;
}