Ruby-Doc.org: Documenting the Ruby Language

Current Ruby Releases

These are the complete API documents for base classes, modules, and included libraries in the current stables releases of Ruby.

Older Ruby Releases

Complete 3.3.6
Complete 3.3.5
Complete 3.3.4
Complete 3.3.3
Complete 3.3.2
Complete 3.3.1
Complete 3.3.0
Complete 3.2.5
Complete 3.2.4
Complete 3.2.3
Complete 3.2.2
Complete 3.2.1
Complete 3.2.0
Complete 3.1.5
Complete 3.1.4
Complete 3.1.3
Complete 3.1.2
3.1.1 Core / 3.1.1 standard library
3.1.0 Core / 3.1.0 standard library
Complete 3.0.6
Complete 3.0.5
Complete 3.0.4
3.0.3 Core / 3.0.3 standard library
3.0.2 Core / 3.0.2 standard library
3.0.1 Core / 3.0.1 standard library
3.0.0 Core / 3.0.0 standard library
Complete 2.7.8
Complete 2.7.7
Complete 2.7.6
2.7.5 Core / 2.7.5 standard library
2.7.4 Core / 2.7.4 standard library
2.7.3 Core / 2.7.3 standard library
2.7.2 Core / 2.7.2 standard library
2.7.1 Core / 2.7.1 standard library
2.7.0 Core / 2.7.0 standard library
2.6.10 Core / 2.6.10 standard library
2.6.9 Core / 2.6.9 standard library
2.6.8 Core / 2.6.8 standard library
2.6.7 Core / 2.6.7 standard library
2.6.6 Core / 2.6.6 standard library
2.6.5 Core / 2.6.5 standard library
2.6.4 Core / 2.6.4 standard library
2.6.3 Core / 2.6.3 standard library
2.6.2 Core / 2.6.2 standard library
2.6.1 Core / 2.6.1 standard library
2.6 Core / 2.6 standard library
2.5.9 Core / 2.5.9 standard library
2.5.8 Core / 2.5.8 standard library
2.5.7 Core / 2.5.7 standard library
2.5.6 Core / 2.5.6 standard library
2.5.5 Core / 2.5.5 standard library
2.5.4 Core / 2.5.4 standard library
2.5.3 Core / 2.5.3 standard library
2.5.2 Core / 2.5.2 standard library
2.5.1 Core / 2.5.1 standard library
2.5.0 Core / 2.5.0 standard library
2.4.10 Core / 2.4.10 standard library
2.4.9 Core / 2.4.9 standard library
2.4.8 Core / 2.4.8 standard library
2.4.7 Core / 2.4.7 standard library
2.4.6 Core / 2.4.6 standard library
2.4.5 Core / 2.4.5 standard library
2.4.4 Core / 2.4.4 standard library
2.4.3 Core / 2.4.3 standard library
2.4.2 Core / 2.4.2 standard library
2.4.1 Core / 2.4.1 standard library
2.4.0 Core / 2.4.0 standard library
2.3.8 Core / 2.3.8 standard library
2.3.7 Core / 2.3.7 standard library
2.3.6 Core / 2.3.6 standard library
2.3.5 Core / 2.3.5 standard library
2.3.4 Core / 2.3.4 standard library
2.3.3 Core / 2.3.3 standard library
2.3.2 Core / 2.3.2 standard library
2.3.1 Core / 2.3.1 standard library
2.3.0 Core / 2.3.0 standard library
2.2.10 Core / 2.2.10 standard library
2.2.7 Core / 2.2.7 standard library
2.2.6 Core / 2.2.6 standard library
2.2.5 Core / 2.2.5 standard library
2.2.4 Core / 2.2.4 standard library
2.2.3 Core / 2.2.3 standard library
2.2.2 Core / 2.2.2 standard library
2.2.1 Core / 2.2.1 standard library
2.2.0 Core / 2.2.0 standard library
2.1.9 Core / 2.1.9 standard library
2.1.8 Core / 2.1.8 standard library
2.1.7 Core / 2.1.7 standard library
2.1.6 Core / 2.1.6 standard library
2.1.5 Core / 2.1.5 standard library
2.1.4 Core / 2.1.4 standard library
2.1.3 Core / 2.1.3 standard library
2.1.2 Core / 2.1.2 standard library
2.1.1 Core / 2.1.1 standard library
2.1.0 Core / 2.1.0 standard library
2.0.0 Core / 2.0.0 standard library
1.9.3 core / 1.9.3 standard library
Keywords defined in 1.9.
MRuby core (this is not an active release version).
Trunk core / Trunk standard library
1.9.2 core1.9.2 Core / 1.9.1 standard library
1.9.1 core1.9.1 Core / 1.9.1 standard library
1.8.7 core1.8.7 Core / 1.8.7 standard library
1.8.6 core - Core API docs for Ruby 1.8.6. / 1.8.6 standard library

Ruby 3.4

Read about what's new in Ruby 3.4: Ruby 3.4 Released