GUID V4 - Random-Based Identifier (Recommended)
GUID v4 is the most widely used random-based identifier. Learn about its structure, collision probability, advantages and why it is recommended for general-purpose applications.
How to Generate UUIDs in Ruby
Generate UUIDs in Ruby with SecureRandom.uuid for v4 and a dedicated gem when you need UUID v7.
Recommendation: use UUID v4 for broad compatibility, and add UUID v7 through a gem when chronological ordering matters.
How to generate UUID v4 in Ruby
require 'securerandom'
id = SecureRandom.uuid
puts idHow to generate UUID v7 in Ruby
# gem install uuid7
require 'uuid7'
id = UUID7.generate
puts idNative support notes
- Ruby commonly uses UUID naming in Rails and backend service code.
- UUID v4 is simple through the standard library.
- UUID v7 support usually comes from a gem rather than the stdlib.
Practical notes
- Keep one gem version pinned if multiple services generate UUID v7.
- UUID v4 remains the lower-risk option for broad interoperability.
- Check UUID v7 if you are optimizing for sortability.
Frequently Asked Questions
Yes. In common Ruby usage,
SecureRandom.uuid is the standard random UUID choice.In most Ruby environments, UUID v7 is added through a gem rather than through the standard library.
Learn more
These articles expand on related concepts, formats and practical considerations.