Bulk UUIDs (10)
About UUID v4 & GUIDs
What is a UUID / GUID?
A UUID (Universally Unique Identifier) or GUID (Globally Unique Identifier) is a 128-bit number used to identify information in computer systems without requiring a central authority. It is typically rendered as 32 hexadecimal characters divided into five groups separated by hyphens (8-4-4-4-12).
Are these UUIDs cryptographically secure?
Yes. This tool uses your browser's native crypto.randomUUID() and crypto.getRandomValues() API. All random bits are produced by the operating system's cryptographically secure pseudo-random number generator (CSPRNG).
Can two UUID v4 values ever collide?
The probability of generating a duplicate UUID v4 is practically zero. With 122 bits of true randomness (approx. 5.3 × 1036 possible values), you would need to generate over 1 billion UUIDs every second for 85 years before having a 50% chance of a single collision.
Does this tool store any generated UUIDs?
No. Every UUID is generated completely client-side inside your browser JavaScript runtime. Nothing is ever sent to, logged by, or stored on our servers.