UUID v4 vs v7: Which Should You Use?
Compare random and time-ordered UUIDs for database keys, privacy, and compatibility, with a practical migration checklist.
Articles
In-depth guides and explanations about unique identifiers, their applications, and best practices.
Can UUIDs Collide? Understanding the Odds
Understand UUID v4 collision probability with worked examples, the birthday calculation, and practical database safeguards.
Are UUIDs Safe in URLs? Privacy and Access Control
Learn what UUIDs reveal, why public identifiers still need authorization, and how to keep resource IDs separate from access tokens.
How our UUID Decoder works
A technical deep dive into the logic behind our UUID decoder. Learn how we parse hex strings, extract timestamps from v7 and v1, and identify variants.
Possible Alternatives to UUID
Explore modern alternatives to UUIDs such as CUID (v2), KSUID, NanoID, ULID, and Snowflake ID. Compare their features, performance, and use cases.
What is UUID?
Understand the basics of Universally Unique Identifiers (UUIDs), their structure, different versions, and how they ensure uniqueness in distributed systems.