UUID Generator
Generate version 4 UUIDs — one or in bulk — using your browser's secure random source. Copy any single value or download the whole set.
Generate UUIDs
v4 · localAbout UUID Generator
The UUID Generator produces version 4 (random) UUIDs, singly or in bulk, using the browser’s cryptographic random source. It is for developers needing unique identifiers for records, keys, or correlation IDs.
Version 4 UUIDs need a good random source to stay collision-free. Generating them locally from the secure random API gives you dependable identifiers without a network call.
Step by step
- Choose how many UUIDs you need — one, or a batch.
- Generate them; each is a standard version 4 identifier.
- Copy a single value, or copy the whole list at once.
- Generate again whenever you need fresh identifiers.
What it offers
- Version 4 UUIDs
- Single or bulk generation
- Browser-based randomness — UUID
- Copyable output
Tips for best results
- Use version 4 UUIDs for general uniqueness; choose a time-ordered scheme only if you need sortability.
- Store UUIDs in a fixed-length or native UUID column rather than free text where your database supports it.
- Do not treat a UUID as a secret — it is unique, not unguessable in a security sense.
Why people use it
Standards-compliant
Produces correctly formatted version 4 UUIDs.
Bulk mode
Create many at once for seeding data or tests.
Secure randomness
Uses the browser’s cryptographic generator.
Instant
No server round-trip; values appear immediately.
Common questions
This runs entirely in your browser
No file or text you enter here is uploaded. Encoding and decoding happen on your device using native browser APIs — close the tab and nothing remains on a server.