UUID Generator
Generate one or more random UUID v4 identifiers.
About UUID Generator
UUID Generator produces one or more random version-4 UUIDs on demand. Reach for it when you need unique identifiers for database rows, test fixtures, correlation IDs, or API keys during development. Each UUID is generated locally in your browser, so you can grab as many as you need without any network round trip.
- Category
- create
- Input
- No file input — params only.
- Output
- Outputs: text/plain.
- Cost
- Free, runs in your browser
- Memory
- low
Common uses
- Seed a database with unique primary keys while writing a migration or fixture
- Generate a correlation or request ID to trace a flow through logs
- Create a batch of UUIDs for mock data in a test suite
- Mint a unique key for a feature flag, cache entry, or temporary resource
- Produce an idempotency key for an API request during local development
- Grab a quick unique filename component for an export or upload path
Frequently asked questions
What version of UUID does it generate?
Random version 4 UUIDs, the standard random-based variant suitable for IDs that don't need to be time- or MAC-derived.
How random are they?
They use the browser's cryptographically secure randomness, so collisions are vanishingly unlikely even across very large numbers of IDs.
Can I generate several at once?
Yes. You can request multiple UUIDs in a single run when you need a batch for seeding or testing.
Is anything sent to a server?
No. UUIDs are generated entirely in your browser, so nothing about them is transmitted or recorded externally.
Are these safe to use as security tokens?
Version 4 UUIDs carry strong randomness, but for secrets like passwords or API keys prefer a tool built for that. For passwords, use the Password Generator.
Keywords
- uuid
- guid
- generate
- random
- identifier
- id