Generate random UUIDs (v4) instantly
Generate universally unique identifiers (UUID version 4) using your browser's cryptographically secure random number generator. Create one or up to 1,000 at once, ready to paste into a database, config file or test data.
UUID Generator: 3 simple steps
- 1
Set how many UUIDs you need.
- 2
Pick formatting options such as uppercase or no hyphens.
- 3
Copy them all with one click.
Choose uppercase, remove hyphens or wrap values in braces to match the format your system expects.
Built for speed and privacy
- Cryptographically secure randomness
- Bulk generation up to 1,000
- Uppercase, no-hyphen and brace formats
- Nothing is stored or transmitted
UUID Generator FAQ
A 128-bit identifier made of random bits, written as 32 hexadecimal digits in five groups. The chance of two v4 UUIDs colliding is negligible.
They come from crypto.randomUUID or crypto.getRandomValues, the browser's cryptographically secure generator.
Yes, but random v4 keys can fragment some indexes. Time-ordered identifiers such as UUID v7 or ULID work better for very large tables.
No. Everything is generated locally and disappears when you close the page.
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