UUID Generator
Generate random UUID v4 strings. Supports bulk generation, uppercase, and no-dash formats.
b0cb4a99-3547-4cc4-b53f-0689b8bd336dCommon use cases
UUIDs are the go-to solution for generating unique identifiers without a central coordination service.
Create database primary keys
Generate unique identifiers for rows before inserting them into a database without relying on auto-increment.
Seed test fixtures
Produce deterministic-looking but unique IDs for unit tests, integration tests, and mock data.
Track distributed events
Assign a UUID to each event or request so you can trace it across microservices and log aggregators.
Frequently asked questions
Short answers to the questions people usually have before using the tool.
Are these UUIDs truly random?+
They use Math.random(), which is sufficient for most non-cryptographic purposes like database IDs, test fixtures, and prototyping. For cryptographic randomness use crypto.randomUUID().
Can I generate UUIDs in bulk?+
Yes. Set the count up to 100 and click Generate to produce a batch. You can copy all results at once.
What UUID version does this tool generate?+
Version 4 (random). The third group always starts with 4 and the fourth group starts with 8, 9, a, or b, following the RFC 4122 specification.
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