Generate Fake Data easily for C++ with faker-cxx

Similar to Laravel's Factory and Faker.js, useful for development environments.

Generate Fake Data easily for C++ with faker-cxx

C++ Faker is a modern open source library that uses C++20 to generate fake data for testing during the development of your applications.

The library is heavily inspired by Faker.js.


Despite using in conjunction with LibFMT and GoogleTest, at the same time, having them is still optional. In the case of LibFMT it will be automatically cloned and GoogleTest can be disabled during compilation.

For you to test from scratch:

01. create a project, enter it and start a repository Git:

mkdir myproject
cd myproject
git init

02. Recursively clone Faker-cxx:

git submodule add

03. Now create a CMakeLists.txt

And add the content below:

cmake_minimum_required(VERSION 3.10)

   VERSION 0.0.1



add_executable(a.out main.cpp)

target_link_libraries(a.out faker-cxx)

Note that in the line: set(BUILD_FAKER_TESTS OFF) we deactivate GoogleTest, and I recommend it because I noticed that there is an array that is bugged. 😃

04. Create a C++ file main.cpp

And add the content below:

#include <format>
#include <iostream>

#include "faker-cxx/include/faker-cxx/Datatype.h"
#include "faker-cxx/include/faker-cxx/Date.h"
#include "faker-cxx/include/faker-cxx/Internet.h"
#include "faker-cxx/include/faker-cxx/String.h"

auto main() -> int {
   const auto id = faker::String::uuid();
   const auto email = faker::Internet::email();
   const auto password = faker::Internet::password();
   const auto nickname = faker::Internet::username();
   const auto active = faker::Datatype::boolean();
   const auto email_check = faker::Datatype::boolean();
   const auto code_check = faker::String::numeric(8);
   const auto created_at = faker::Date::pastDate();
   const auto updated_at = faker::Date::recentDate();

   std::cout << std::format("id: {}", id) << '\n';
   std::cout << std::format("email: {}", email) << '\n';
   std::cout << std::format("password: {}", password) << '\n';
   std::cout << std::format("nickname: {}", nickname) << '\n';
   std::cout << std::format("active: {}", active) << '\n';
   std::cout << std::format("email_check: {}", email_check) << '\n';
   std::cout << std::format("code_check: {}", code_check) << '\n';
   std::cout << std::format("created_at: {}", created_at) << '\n';
   std::cout << std::format("updated_at: {}", updated_at) << '\n';

   return 0;

In this example there are several fakers that you can generate, but there are more examples such as: Company Name, Animals, … and others!

05. Copy and run

cmake . -B build
cd build && make

Example of similar output:

id: 885c6f73-48e1-49c5-b718-cc099c26486c
password: Gy4.hX*=HA|OG?_
nickname: AltonKulas
active: true
email_check: true
code_check: 23567299
created_at: 2023-05-05T11:39:05Z
updated_at: 2023-11-16T13:07:05Z

Every time you run the binaries, new data will be generated!

For more information visit the repository:

cpp cppdaily