Ruby Standard Gems

About Ruby's Gemified Standard Library

Large portions of Ruby's standard library come in the form of RubyGems, which can be updated independently from Ruby.

There are two different kinds of standard gems:

• Default gems: These gems are part of Ruby and you can always require them directly. You cannot remove them. They are maintained by Ruby core.

• Bundled gems: The behavior of bundled gems is similar to normal gems, but they get automatically installed when you install Ruby. They can be uninstalled and they are maintained outside of Ruby core.

There are a few libraries that will stay non-gem default libraries, because they are very dependent on the specific Ruby version.

Standard Gems Version Data

Every Ruby version ships a specific set of default gems, default libraries, and bundled gems. The following tables show all standard libraries included in the current Ruby version 3.3.0. The data is also available as JSON:

• default_gems.json
• bundled_gems.json
• libraries.json
• stdgems.json

The first two files contain data about all default and bundled gems and which Ruby version comes with which version of the gem. The third file contains data about all the non-gemified standard libraries. The fourth JSON combines the above ones into a single unified list.

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Default Gems in Ruby 3.3.0

Bundled Gems in Ruby 3.3.0

Default Libraries

Gem Tables by Version

• Gem list for Ruby: 3.3.0
• Gem list for Ruby: 3.2.3 · 3.2.2 · 3.2.1 · 3.2.0
• Gem list for Ruby: 3.1.4 · 3.1.3 · 3.1.2 · 3.1.1 · 3.1.0
• Gem list for Ruby: 3.0.6 · 3.0.5 · 3.0.4 · 3.0.3 · 3.0.2 · 3.0.1 · 3.0.0
• Gem list for Ruby: 2.7.8 · 2.7.7 · 2.7.6 · 2.7.5 · 2.7.4 · 2.7.3 · 2.7.2 · 2.7.1 · 2.7.0
• Gem list for Ruby: 2.6.10 · 2.6.9 · 2.6.8 · 2.6.7 · 2.6.6 · 2.6.5 · 2.6.4 · 2.6.3 · 2.6.2 · 2.6.1 · 2.6.0
• Gem list for Ruby: 2.5.9 · 2.5.8 · 2.5.7 · 2.5.6 · 2.5.5 · 2.5.4 · 2.5.3 · 2.5.2 · 2.5.1 · 2.5.0
• Gem list for Ruby: 2.4.10 · 2.4.9 · 2.4.8 · 2.4.7 · 2.4.6 · 2.4.5 · 2.4.4 · 2.4.3 · 2.4.2 · 2.4.1 · 2.4.0
• Gem list for Ruby: 2.3.8 · 2.3.7 · 2.3.6 · 2.3.5 · 2.3.4 · 2.3.3 · 2.3.2 · 2.3.1 · 2.3.0
• Gem list for Ruby: 2.2.10 · 2.2.9 · 2.2.8 · 2.2.7 · 2.2.6 · 2.2.5 · 2.2.4 · 2.2.3 · 2.2.2 · 2.2.1 · 2.2.0
• Compare versions: Main Rubies · Supported Rubies · All Rubies · 3.2 · 3.1 · 3.0 · 2.7 · 2.6 · 2.5 · 2.4 · 2.3 · 2.2
• Gemified in: 3.2 · 3.1 · 3.0 · 2.7 · 2.6 · 2.5 · 2.4 · 2.3 · 2.2
• List of Non-Gem Default Libraries
• List of Unmaintained Default Gems
• List of Removed Standard Gems

About stdgems.org

This page and the JSON data files it is based on are maintained on GitHub. Originally based on episode 20 of Idiosyncratic Ruby and put together by Jan Lelis.

Page Version: 5.4.0 (Change Log)

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