#uuid
Showing 2 articles
tutorials
UUID v4 vs v7 vs ULID vs Snowflake: ID Selection Guide (2026)
A practical guide to distributed ID selection: UUID v4, v7, ULID, Snowflake ID, and NanoID compared on database performance, sortability, storage size, and ecosystem support with code examples.
#uuid
#ulid
#snowflake-id
Mar 19, 2026
15 min read
tutorials
What Is a UUID? The Complete Guide to Format, Versions & Use Cases
Understand UUIDs from the ground up: 128-bit structure, hex format explained, how v1/v3/v4/v5/v7 work internally, collision math, real-world use cases, security pitfalls, and language-specific code examples.
#uuid
#guid
#rfc-9562
Mar 19, 2026
13 min read