https://github.com/faker-ruby/faker

A library for generating fake data such as names, addresses, and phone numbers.
https://github.com/faker-ruby/faker

Keywords

fake ruby

Keywords from Contributors

activerecord mvc activejob rubocop static-code-analysis code-formatter rubygems rack rspec sidekiq

Last synced: about 14 hours ago
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Repository metadata

A library for generating fake data such as names, addresses, and phone numbers.

Host: GitHub
URL: https://github.com/faker-ruby/faker
Owner: faker-ruby
License: mit
Created: 2008-12-24T17:20:37.000Z (about 17 years ago)
Default Branch: main
Last Pushed: 2026-02-25T19:08:26.000Z (5 days ago)
Last Synced: 2026-02-25T20:58:44.357Z (5 days ago)
Topics: fake, ruby
Language: Ruby
Homepage:
Size: 14.3 MB
Stars: 11,610
Watchers: 127
Forks: 3,179
Open Issues: 18
Releases: 49
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: License.txt
- Security: SECURITY.md

Faker

Quick links

📖 Read the documentation for the latest version.
📢 See what's changed in recent versions.

Features

Internet: Email addresses, Passwords, Domains, etc.
Date and Time: Travel back in time or to the future.
Person: Names, Genders, Bios, Job titles, and more.
Number and String: Random numbers and strings.
Location: Addresses, Zip Codes, Street Names, States, and Countries.
Finance: Account Details, Transactions, and Crypto Addresses.
Localization - Customize faker with over 40 locales to generate realistic-looking Names, Addresses, and Phone Numbers.

Note: The generated names, addresses, emails, phone numbers, and/or other data might return valid information. Please be careful when using faker in your tests.

For a complete list of the generators, see Generators.

Getting Started

Start by including faker in your Gemfile:

gem 'faker'

Then run bundle install.

Usage

require 'faker'

Faker::Name.name                      #=> "Christophe Bartell"
Faker::Internet.password              #=> "Vg5mSvY1UeRg7"
Faker::Internet.email                 #=> "eliza@mann.test"
Faker::Address.full_address           #=> "5479 William Way, East Sonnyhaven, LA 63637"
Faker::Markdown.emphasis              #=> "Quo qui aperiam. Amet corrupti distinctio. Sit quia *dolor.*"
Faker::Lorem.paragraph                #=> "Recusandae minima consequatur. Expedita sequi blanditiis. Ut fuga et."
Faker::Alphanumeric.alpha(number: 10) #=> "zlvubkrwga"
Faker::ProgrammingLanguage.name       #=> "Ruby"

Faker

Notes

While Faker generates data at random, returned values are not guaranteed to be unique by default. To explicitly specify when you require unique values, see Ensuring Unique Values.
Values also can be deterministic if you use the deterministic feature, see Deterministic Random.
This is the main branch of Faker and may contain changes that are not yet released. The list of all versions is available here.

Ensuring unique values

To ensure Faker generates unique values, prefix your method call with unique:

Faker::Name.unique.name # This will return a unique name every time it is called

If too many unique values are requested from a generator that has a limited
number of potential values, a Faker::UniqueGenerator::RetryLimitExceeded
exception may be raised. It is possible to clear the record of unique values
that have been returned, for example between tests.

Faker::Name.unique.clear     # Clears used values for Faker::Name
Faker::UniqueGenerator.clear # Clears used values for all generators

You can also give some already-used values to the unique generator if you have
collisions with the generated data (i.e., using FactoryBot with random and
manually set values).

# Faker::<generator>.unique.exclude(method, arguments, list)

# Add 'azerty' and 'wxcvbn' to the string generator with 6 char length
Faker::Lorem.unique.exclude :string, [number: 6], %w[azerty wxcvbn]

Deterministic Random

Faker supports seeding of its pseudo-random number generator (PRNG)
to provide deterministic output of repeated method calls.

Faker::Config.random = Random.new(42)
Faker::Lorem.word              #=> "velit"
Faker::Lorem.word              #=> "quisquam"

Faker::Config.random = Random.new(42)
Faker::Lorem.word              #=> "velit"
Faker::Lorem.word              #=> "quisquam"

Faker::Config.random = nil     # seeds the PRNG using default entropy sources
Faker::Config.random.seed      #=> 185180369676275068918401850258677722187
Faker::Lorem.word              #=> "ipsam"

Localization

You may want Faker to print information depending on your location in the world.
To assist you in this, Faker uses the I18n gem to store strings and formats to
represent the names and postal codes of the area of your choosing.

Just set the locale you want as shown below, and Faker will take care of the rest.

Faker::Config.locale = 'es'
# or
Faker::Config.locale = :es

To override Faker's locales, and set it on threaded server environments
check out the locales README.

Minitest and Faker >= 2.22

To prevent Faker (version >= 2.22) from generating duplicate values when using Minitest,
you might need to add the following to the test_helper.rb or rails_helper.rb file:

  Faker::Config.random = Random.new

Generators

To see the full list, check out the GENERATORS document.

Contributing

Note: We are not accepting proposals for new generators and locales. The Contributing guide has a few notes about this decision.

Take a look at the Contributing document for
instructions on setting up the repo on your machine, opening bug reports, understanding the codebase,
and creating a good pull request.

There is a Discord channel to discuss anything
regarding improvements or feature requests. This is not actively monitored by the current maintainers.

Thank you, contributors!

Versioning

Faker follows Semantic Versioning 2.0 as defined at https://semver.org.

Inspiration

Faker was inspired by Perl's Data::Faker library.

In the media

📰 With Great Humor Comes Great Developer Engagement - KTH Royal Institute of Technology research
🎧 Computer und Kommunikation 4.5.2024, komplette Sendung - Deutschland Funk Radio Interview

License

This code is free to use under the terms of the MIT license.

Owner metadata

Name: Faker
Login: faker-ruby
Email:
Kind: organization
Description: We're committed to offering the best faker generators.
Website:
Location:
Twitter:
Company:
Icon url: https://avatars.githubusercontent.com/u/47637297?v=4
Repositories: 1
Last ynced at: 2024-03-25T18:40:56.080Z
Profile URL: https://github.com/faker-ruby

GitHub Events

Total

Release event: 2
Delete event: 79
Pull request event: 205
Fork event: 43
Issues event: 41
Watch event: 307
Issue comment event: 126
Push event: 157
Gollum event: 1
Pull request review comment event: 38
Pull request review event: 80
Create event: 92

Last Year

Release event: 1
Delete event: 57
Pull request event: 144
Fork event: 27
Issues event: 38
Watch event: 199
Issue comment event: 89
Push event: 127
Pull request review comment event: 20
Gollum event: 1
Pull request review event: 49
Create event: 66

Committers metadata

Last synced: about 14 hours ago

Total Commits: 2,583
Total Committers: 1,042
Avg Commits per committer: 2.479
Development Distribution Score (DDS): 0.902

Commits in past year: 95
Committers in past year: 24
Avg Commits per committer in past year: 3.958
Development Distribution Score (DDS) in past year: 0.579

Name	Email	Commits
Vitor Oliveira	v**o@g**m	253
Benjamin Curtis	b**s@g**m	158
dependabot[bot]	4**]@u**m	142
dependabot-preview[bot]	2**]@u**m	67
Connor Shea	c**a@g**m	52
Juha	j**s@o**m	48
Stefanni Brasil	s**l@g**m	46
Stefanni Brasil	s**l@p**e	45
danielTiringer	5**r@u**m	30
Benjamin Curtis	b**n@b**m	28
Koichi ITO	k**o@g**m	25
Stephen A. Wilson	s**6@h**m	24
Sibi	s**i@p**n	20
Katrina Owen	k**n@g**m	17
gkunwar	g**9@g**m	16
Simon Fish	si@m****h	13
salexzee	s**b@c**m	13
Sudeep Tarlekar	s**r@g**m	13
Thiago Araujo	t**o@g**m	12
Yuko Miura	4**n@u**m	11
Thiago Araujo	7**o@u**m	11
Steven Atkinson	m**k@g**m	11
Bryan Mytko	b**o@g**m	11
danielTiringer	t**l@g**m	10
Pascal Schumacher	p**r@g**t	10
Geremia Taglialatela	t**a@u**m	10
Akira Matsuda	r**e@d**p	10
Tiago Farias	a**m@g**m	9
Cathy Cramer	c**r@r**m	9
Maxmiliano Franco Braga	m**o@g**m	8
and 1012 more...

Committer domains:

Issue and Pull Request metadata

Last synced: about 18 hours ago

Total issues: 88
Total pull requests: 583
Average time to close issues: 7 months
Average time to close pull requests: 20 days
Total issue authors: 68
Total pull request authors: 136
Average comments per issue: 4.5
Average comments per pull request: 0.9
Merged pull request: 324
Bot issues: 1
Bot pull requests: 255

Past year issues: 21
Past year pull requests: 127
Past year average time to close issues: about 1 month
Past year average time to close pull requests: 15 days
Past year issue authors: 13
Past year pull request authors: 25
Past year average comments per issue: 1.38
Past year average comments per pull request: 0.61
Past year merged pull request: 48
Past year bot issues: 0
Past year bot pull requests: 66

More stats: https://issues.ecosyste.ms/repositories/lookup?url=https://github.com/faker-ruby/faker

Top Issue Authors

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Top Pull Request Authors

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Top Issue Labels

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💡 Issue: Feature Request (1)

Package metadata

Total packages: 9
Total downloads:
- rubygems: 616,703,101 total
Total docker downloads: 574,390,890
Total dependent packages: 1,074 (may contain duplicates)
Total dependent repositories: 143,796 (may contain duplicates)
Total versions: 281
Total maintainers: 4

gem.coop: faker

Faker, a port of Data::Faker from Perl, is used to easily generate fake data: names, addresses, phone numbers, etc.

Homepage: https://github.com/faker-ruby/faker
Documentation: http://www.rubydoc.info/gems/faker/
Licenses: MIT
Latest release: 3.6.0 (published about 1 month ago)
Last Synced: 2026-03-02T13:02:50.361Z (about 18 hours ago)
Versions: 94
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 308,389,310 Total
Docker Downloads: 287,195,445
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 0.027%
- Downloads: 0.08%
Maintainers (4)
- vbrazo
- stympy
- thd
- stefannibrasil

rubygems.org: faker