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GUID Generator

Generate random UUIDs/GUIDs in various formats. Uses cryptographically secure random number generation when available.

Options
Configure the output format and count

Lowercase with hyphens

550e8400-e29b-41d4-a716-446655440000
Output
Click generate to create GUIDs
No GUIDs generated yet. Configure options and click Generate.
About UUID/GUID

UUID (Universally Unique Identifier) and GUID (Globally Unique Identifier) are 128-bit identifiers that are unique across space and time. This generator creates Version 4 UUIDs, which are randomly generated.

Structure

128 bits = 32 hex characters, typically formatted as 8-4-4-4-12 with hyphens

Uniqueness

2^122 possible values (~5.3 x 10^36). Collision probability is negligible.