UUID v4 is a 128-bit identifier generated from 122 cryptographically random bits. The collision probability is negligible (1 in trillions).

What is the difference between UUID and GUID?

GUID (Globally Unique Identifier) is Microsoft's implementation of the standard UUID specification. They are functionally identical.

Can I generate in bulk?

Yes! You can generate anywhere from 1 to 100 unique identifiers simultaneously and export as plain text or a JSON array.

UUID Generator

Generate unique v4 and v1 identifiers in bulk.

Free No Signup 100% Private No Watermark

Quantity to Generate5 items

UPPERCASEHyphens (-)Braces {...}JSON Array Format

Generated Identifiers (0)

More Dev Tools

How to Use UUID Generator in 3 Easy Steps

Fast, local, and completely free with no software installation required.

Select or Drop Your File

Choose or drag-and-drop your file into the secure workspace directly from your device.

Customize Settings & Process

Adjust desired quality, options, or target formatting in real-time with instant browser processing.

Download Your Finished File

Save your optimized, watermark-free result immediately with zero server uploads or tracking.

About UUID Generator

A fast, client-side UUID (Universally Unique Identifier) / GUID generator for database records, APIs, and microservices. Generate standard RFC 4122 v4 (random) and v1 (timestamp-based) identifiers or compact NanoIDs in bulk with custom formatting options.

All file conversions, resizing, and processing take place directly in your browser using modern WebAssembly and HTML5 Canvas technologies. No data is stored, tracked, or sent across external networks.