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UUID Generator

Generate UUIDs (v4) - single or bulk, with options

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What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier that is globally unique. The most common variant is UUID v4, which is based on random numbers and has practically no collision risk. UUIDs are represented as 32 hexadecimal characters, grouped into 5 blocks in the format 8-4-4-4-12. They are the standard for unique identifiers in databases, APIs, and distributed systems. UUIDs eliminate the need for centralized ID generation, making them perfect for microservices and distributed architectures.

How do I use the UUID Generator?

Set the desired count (1 to 100), choose whether you want uppercase or hyphens, and click "Generate". Each UUID can be copied individually, and when generating multiple UUIDs, there is also a "Copy All" button. The generation uses your browser's secure crypto.randomUUID() method for cryptographically strong random values.

Why generate UUIDs online?

Our UUID Generator creates cryptographically secure UUIDs directly in your browser. You need no terminal, no programming language, and no installation. Ideal for quick tests, database seeds, or when you simply need a unique ID. Everything runs locally - no data is transmitted to any server, ensuring your generated identifiers remain completely private.

More Tools

Also try our Hash Generator for SHA hashes, the Password Generator for secure passwords, or the JSON Generator for test data with embedded UUIDs.

Frequently Asked Questions

Which UUID version does this generator use?
It generates UUID v4, which is based on random numbers. v4 is the most common version for general-purpose unique IDs.
Are the UUIDs cryptographically secure?
Yes, the generator uses crypto.randomUUID() from the Web Crypto API, which produces cryptographically strong random values.
What is the chance of collisions?
Practically zero. The number of possible UUID v4 values is so large that collisions are negligible even for trillions of IDs.
How many UUIDs can I generate at once?
You can generate up to 100 UUIDs at a time and copy them all with one click.

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