UUID Generator
Generate cryptographically secure RFC 4122 Version 4 UUIDs (GUIDs) in bulk directly in your browser with formatting options.
This tool runs in your browser.
Your result will appear here.
How to use
- 01Choose the number of UUIDs to generate and set uppercase or hyphen options.
- 02Click 'Run' to generate cryptographically strong UUID v4 strings.
- 03Copy the generated list directly for software testing or database seeds.
FAQ
What is a Version 4 UUID and how unlikely are collisions?
UUID v4 relies on 122 pseudo-random bits. The mathematical likelihood of a random collision across billions of generated values is practically zero.
Are these generated UUIDs cryptographically random?
Yes. The generator utilizes the browser's crypto.getRandomValues CSPRNG engine, making them suitable for production tokens and database primary keys.
Are generated identifiers logged or transmitted across the web?
No. All UUIDs are calculated strictly in your local browser memory and are never transmitted to our servers.