Tiny Toolkit

UUID Generator

Generate one or up to 100 UUID v4 strings in a single click, using your browser's cryptographically secure crypto.randomUUID() API. Toggle uppercase formatting or copy all results as a newline-separated list. UUIDs are the industry-standard format for unique record identifiers across databases, APIs, and distributed systems.

All processing happens in your browser. No data is sent to any server.

Frequently Asked Questions

What is a UUID v4?
A UUID (Universally Unique Identifier) v4 is a 128-bit random identifier formatted as 8-4-4-4-12 hexadecimal characters. The probability of two v4 UUIDs colliding is astronomically small.
Are these UUIDs cryptographically secure?
Yes. The tool uses the browser's crypto.randomUUID() API, which draws from a cryptographically secure source of randomness.
What is the difference between a UUID and a GUID?
There is no practical difference. GUID (Globally Unique Identifier) is Microsoft's term for the same 128-bit identifier format defined by RFC 4122.

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