Can two UUIDs collide?

The collision probability of UUID v4 is so infinitesimally low that generating a duplicate is practically impossible.

What is the difference between UUID and GUID?

GUID is Microsoft's terminology for UUID; both follow the exact same 128-bit RFC 4122 standard.

Yes, one-click export into JSON arrays or comma-separated lists for database seeding.

Instant

Generate bulk Version 4 (v4) and Version 1 (v1) UUIDs / GUIDs with customizable case and hyphens.

Version:

Count:

Format Options:

UUID Inspector & Timestamp Decoder

RFC 4122 compliant Version 4 (v4) random UUID generation

Bulk generation from 1 up to 1,000 unique UUIDs at once

Formatting options: with/without hyphens, braces {}, uppercase, and JSON array

One-click copy all or download as .txt file

Select how many UUIDs you need (1 to 500+).

Choose uppercase/lowercase, hyphens, or JSON array format.

Instant cryptographic creation.

Copy all items to clipboard or save as a text file.

UUID (Universally Unique Identifier) Version 4 is a 128-bit identifier generated using cryptographically strong pseudo-random numbers.

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