Which UUID version is generated?

The tool generates UUID version 4 values with crypto.randomUUID, so the identifying bits are random rather than time- or name-based.

Are UUID and GUID different here?

In this interface the terms refer to the same 128-bit identifier format. GUID is the name commonly used in Microsoft ecosystems.

Does removing dashes change the identifier?

It changes only the text representation. Some systems accept the 32 hexadecimal digits without separators; others require the standard dashed form.

UUID & GUID Generator

LocalFree

Generate cryptographically random UUID v4 / GUID identifiers in bulk - useful for primary keys, request IDs, and distributed systems.

Output

Input

UppercaseWrap in { }No dashes

Output

Excellent122 bits of entropy

A UUID v4 carries 122 bits, not 128: six of its bits are fixed by the standard to record the version and variant. This is per UUID — generating more of them does not make any one harder to guess.

Runs in your browser; files and input stay on this device

How to use UUID & GUID Generator

1Set how many UUIDs to create, from 1 to 500.
2Choose uppercase, no-dash, or wrapper options if your target format requires them.
3Select Generate UUIDs, then copy one value or the full list.

Frequently asked questions

Which UUID version is generated?: The tool generates UUID version 4 values with crypto.randomUUID, so the identifying bits are random rather than time- or name-based.
Are UUID and GUID different here?: In this interface the terms refer to the same 128-bit identifier format. GUID is the name commonly used in Microsoft ecosystems.
Does removing dashes change the identifier?: It changes only the text representation. Some systems accept the 32 hexadecimal digits without separators; others require the standard dashed form.