Free UUID/GUID Generator Online

How to Use the UUID/GUID Generator

Click Generate for new UUID v4. Generate multiple at once. Copy individual or full list.

UUIDs everywhere in development. Generate instantly without coding.

Frequently Asked Questions

UUID vs GUID — are they the same?

UUID (standard term) and GUID (Microsoft name) identical.

Are UUIDs truly unique?

122 random bits; collision astronomically unlikely.

What is UUID v4?

Random version; most common.

Can I generate UUIDs in bulk?

Yes, 10, 50, 100+ at once.

About This Tool

Generate UUIDs (Universally Unique Identifiers) and GUIDs in version 1, 4, and 5 formats with the Toolzie UUID/GUID Generator. Generate in bulk, in uppercase or lowercase, with or without hyphens.

How to Use

Select the UUID version (v1, v4, or v5).
Set the number of UUIDs to generate.
Choose formatting: uppercase/lowercase, with/without hyphens.
Click Generate and copy your UUIDs.

Frequently Asked Questions

What is the difference between UUID v1 and v4?

UUID v1 is based on the current timestamp and MAC address. UUID v4 is completely random. v4 is preferred for privacy and general use.

Are UUIDs truly unique?

UUID v4 has 122 bits of randomness — the probability of collision is astronomically small, making them effectively unique in practice.

What is a GUID?

GUID (Globally Unique Identifier) is Microsoft's term for UUID. They are the same format and interchangeable.

Can I use UUID as a database primary key?

Yes — UUIDs are commonly used as primary keys, especially in distributed systems where sequential integer IDs can conflict.

UUID/GUID Generator

How to Use the UUID/GUID Generator

Frequently Asked Questions

About This Tool

How to Use

Frequently Asked Questions

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