Programming language: Kotlin
License: MIT License
Tags: Tests    
Latest version: v1.10.0

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Generates realistically-looking fake data
Just like this fake-logo, but not quite so.

Build Status Maven Central Sonatype Nexus (Snapshots) Issues GitHub Top Lang Awesome Kotlin [Licence](LICENCE.md)


Port of a popular ruby faker gem written in kotlin. Generates realistically looking fake data such as names, addresses, banking details, and many more, that can be used for testing and data-anonymization purposes.


Documentation for kotlin-faker is available at serpro69.github.io/kotlin-faker/.


Latest releases are always available on maven central.

With gradle

dependencies {
    implementation 'io.github.serpro69:kotlin-faker:$version'

With maven


Snapshots are also available using the following repository: https://oss.sonatype.org/content/repositories/snapshots/

With gradle

repositories {
    maven {
        url = 'https://oss.sonatype.org/content/repositories/snapshots/'

With maven

        <name>Sonatype Snapshot</name>

Generating data

val faker = faker { }

faker.name.firstName() // => Ana
faker.address.city() // => New York


Command line application can be used for a quick lookup of faker functions. See [faker-bot README](cli-bot/README.md) for installation and usage details.


To run unit tests: ./gradlew clean test

To run integration tests: ./gradlew clean integrationTest

Build and Deploy

To deploy to OSS Sonatype repo:

  • set the following properties in ~/.gradle/gradle.properties
    • signing.keyId=<key_id>
    • signing.password=<key_passphrase>
    • signing.secretKeyRingFile=/home/user/.gnupg/secring.gpg
    • sonatypeUsername=<oss_user_token>
    • sonatypePassword=<oss_password_token>
    • stagingProfileId=<oss_staging_profile_id>
  • running publishFakerCorePublicationToSonatypeRepository will publish the artifacts to either staging release repo or to snapshots repo, depending on the current version

Bumping versions

Versions need to be bumped manually through a tag with the next release version that has to follow the semver rules, and the tag has to be pushed to origin.

Creating the tag can be either done manually with git tag or by using gradlew tag task.


To create a new pre-release version (new release candidate) the following can be used: ./gradlew clean tag -Prelease -PnewPreRelease -PbumpComponent={comp}, where comp can be one of the following values: major, minor, or patch.

To bump an existing pre-release to the next version (next release candidate for the same release version) the following can be used: ./gradlew clean tag -Prelease -PpreRelease.


To promote a pre-release to a release version the following can be used: ./gradlew clean tag -Prelease -PpromoteToRelease,

To create a new release version the following can be used: ./gradlew clean tag -Prelease -PbumpComponent={comp}, where comp can be one of the following values: major , minor, or patch.

Make targets

Alternatively to the above targets from [Makefile](Makefile) can be used for the same purposes.


The [CONTRIBUTING](CONTRIBUTING.adoc) guidelines should help in getting you started on how to contribute to this project.


Many thanks to these awesome tools that help us in creating open-source software:
Intellij IDEA YourKit Java profiler


This code is free to use under the terms of the MIT licence. See [LICENCE](LICENCE.adoc).

*Note that all licence references and agreements mentioned in the kotlin-faker README section above are relevant to that project's source code only.