UUID Generator
Generate random v4 UUIDs for databases, test data, API payloads, and development workflows. Everything happens locally in your browser.
Generate unique IDs without leaving the page
A UUID is a 128-bit identifier that's practically guaranteed to be unique without any central coordination, which makes it the go-to ID for database records, distributed systems, event tracking, API examples, and realistic mock data. Instead of hand-typing fake IDs or spinning up a script, generate a batch here — anywhere from one to a hundred at a time — and copy them all in a click.
These are version 4 UUIDs, the fully random variant used for most application records and test fixtures. The values
come from the browser's cryptographically secure crypto.randomUUID() where available, with a
standards-compliant random fallback for older environments, so the randomness is real rather than a predictable
pseudo-sequence.
Private and instant
Every UUID is created locally on your device — nothing is requested from or logged by a server, so they're safe to use for anything from throwaway test data to production identifiers.
Frequently Asked Questions
What is a UUID?
A UUID is a 128-bit identifier commonly used to create unique IDs across systems without coordinating with a central server.
Are these UUIDs generated locally?
Yes. The browser crypto API creates the random values on your device. Nothing is sent to a server.
What version does this generate?
This tool generates v4 UUIDs, the random UUID format most commonly used for app records and test data.
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