A UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify information in computer systems. It is standardized by RFC 4122.

What is the difference between UUID v1 and v4?

UUID v1 is generated using the current timestamp and machine MAC address. UUID v4 is randomly generated, making it more private and the most widely used version.

Is this UUID generator free?

Yes, completely free with no registration required. All generation happens in your browser.

Are generated UUIDs unique?

UUID v4 has 2^122 possible values, making collisions statistically impossible in practice.

UUID v7 is a newer standard that is time-ordered, making it ideal for database primary keys as it preserves insert order.

Free UUID Generator Online

Generate cryptographically random UUID v1, v4, and v7 values instantly in your browser. Single or bulk, copy or download — nothing leaves your device.

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Frequently Asked Questions

What is a UUID?: A UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify information in computer systems. It is standardized by RFC 4122.
What is the difference between UUID v1 and v4?: UUID v1 is generated using the current timestamp and machine MAC address. UUID v4 is randomly generated, making it more private and the most widely used version.
Is this UUID generator free?: Yes, completely free with no registration required. All generation happens in your browser.
Are generated UUIDs unique?: UUID v4 has 2^122 possible values, making collisions statistically impossible in practice.
What is UUID v7?: UUID v7 is a newer standard that is time-ordered, making it ideal for database primary keys as it preserves insert order.