ID Format Comparisons

Side-by-side comparisons of popular unique identifier formats to help you choose the right one for your project.

ULID vs UUID

Compare ULID and UUID side by side — sortability, performance, encoding, and use cases. Learn when to choose ULID over UUID for your application.

KSUID vs ULID comparison — bit structure, timestamp precision, encoding, and when to use each time-sortable unique identifier format.

UUID v4 vs UUID v7 comparison — understand the differences between random and time-sorted UUIDs, database performance, and migration considerations.

CUID2 vs Nano ID comparison — security, performance, bundle size, and use cases for two leading random ID generators.

Snowflake ID vs UUID v7 comparison — 64-bit integer vs 128-bit UUID, throughput, sortability, and distributed system trade-offs.