Random Guid Generator

Your GUID:

What Is a GUID?

A GUID (Globally Unique Identifier), also known as a UUID (Universally Unique Identifier), is a 128-bit value used to uniquely identify objects or records in computer systems. Our online GUID generator uses a cryptographically secure random number generator to produce collision-resistant identifiers that are virtually guaranteed to be unique.

Why Use a GUID Generator?

GUIDs simplify data integration, replication, and merging across multiple databases, applications, and services without risk of primary key conflicts. Unlike sequential integers, GUIDs:

Offer global uniqueness across disparate systems.
Eliminate coordination overhead when combining datasets.
Support distributed architectures where central ID assignment isn’t feasible.

While collisions are theoretically possible, the probability is astronomically low for any practical number of records (e.g., 2¹²⁸ possible values).

How to Generate GUIDs in Code

For developers who prefer generating GUIDs in your own environment, check out our detailed guides:

If you require bulk generation, nullable options, or weighted distributions, our Online Data Generator supports over 70 data types with configurable settings.

For more background, see the UUID article on Wikipedia.

How to Use the Random GUID Generator

Enter the number of GUIDs you need (up to 100 per batch).
Click the "Generate Random GUID" button.
Click any generated GUID to copy it instantly to your clipboard.

Note: You can generate up to 100 GUIDs in a single session.

Key Features of Our GUID Generator

True random GUIDs using secure algorithms (version 4 UUIDs).
Options to output in uppercase, lowercase, or bracketed formats.
Instant one-click copy for each GUID entry.
No registration, no API keys—100% free and unlimited.
Mobile-friendly design for generation on any device.