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Hazuu Tools

UUID Generator

Generate UUID v1 (timestamp-based) and v4 (random) identifiers for your projects.

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Click "Generate" to create UUIDs
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About UUID Generator

A UUID (Universally Unique Identifier) is a 128-bit identifier that is guaranteed to be unique across all devices and time. UUIDs are widely used in software development for database primary keys, distributed systems, session identifiers, and API resources where globally unique IDs are required.

Our UUID Generator supports both version 1 (timestamp-based) and version 4 (random) formats. Version 4 UUIDs are generated using cryptographically secure random numbers, while version 1 UUIDs incorporate timestamp information. All generation happens in your browser — no data is sent to any server.

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How to Use

01

Select Version

Choose UUID version 1 (timestamp-based) or version 4 (random) depending on your needs.

02

Set Options

Configure the number of UUIDs to generate and format preferences like case and hyphens.

03

Generate & Copy

Click Generate to create UUIDs, then copy them individually or all at once to your clipboard.

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Frequently Asked Questions

What is a UUID Generator? expand_more
A UUID Generator creates Universally Unique Identifiers — 128-bit values formatted as 32 hexadecimal digits displayed in five groups separated by hyphens (e.g., 550e8400-e29b-41d4-a716-446655440000). UUIDs are designed to be unique without requiring a central registration authority.
What is the difference between UUID v1 and v4? expand_more
UUID v1 is generated using the current timestamp and a node identifier, making it partially predictable but sortable by time. UUID v4 is generated entirely from random numbers, making it unpredictable and the most commonly used version for general purposes.
Are UUIDs truly unique? expand_more
For UUID v4, the probability of generating a duplicate is astronomically low — approximately 1 in 2^122. You would need to generate about 2.71 quintillion UUIDs to have a 50% chance of a collision, making them effectively unique for all practical purposes.
Can I generate UUIDs in bulk? expand_more
Yes, use the quantity slider to generate up to 50 UUIDs at once. Each UUID is displayed on its own line, and you can copy all of them at once using the Copy All button.
Is my data secure? expand_more
Yes, all UUID generation happens entirely in your browser using the Web Crypto API. No data is transmitted to any server, ensuring complete privacy.