Generator
UUID Generator
Generate unique UUIDs (v4) for your applications and databases.
Why UUIDs show up in modern software
Universally unique identifiers (UUIDs) are used as database keys, file names, and correlation IDs because they are cheap to generate and rarely collide in practice. Version 4 UUIDs, when implemented well, are appropriate for “generate an ID and move on” workflows. They are not a security boundary by themselves.
Use the tool
Practical use
Generate a UUID, copy it, and use it in your app’s ID field, local data store, or test fixture. If you need deterministic IDs for replication or offline-first sync, you may need a different strategy than random UUIDs. If you are exposing IDs publicly, treat them as opaque tokens rather than secrets.
Uniqueness expectations
Random UUIDs are not mathematically impossible to collide, but the probability is low for normal applications. The tool cannot coordinate global uniqueness across distributed systems; your architecture still matters.