Is UUID Generator free?

Yes, all tools provided by WebTools are completely free to use with no signup required.

Is UUID Generator safe?

Absolutely safe. All data processing happens locally in your browser. Nothing is uploaded to any server, ensuring your privacy is fully protected.

Do I need to install software to use UUID Generator?

No installation needed. All tools run in your browser - just open the page and start using them immediately.

UUID (Universally Unique Identifier) is a 128-bit identifier standard defined in RFC 4122. It's represented as 32 hexadecimal digits displayed in 5 groups separated by hyphens, e.g., 550e8400-e29b-41d4-a716-446655440000.

UUID v4 is generated using random numbers. It's the most commonly used version because it doesn't require a central authority or coordination between systems. The probability of generating a duplicate is negligible.

Are UUIDs really unique?

Yes, for practical purposes. The probability of generating two identical UUID v4s is approximately 1 in 2.71 × 10^18. You would need to generate 1 billion UUIDs per second for 85 years to have a 50% chance of a collision.

What are UUIDs used for?

UUIDs are used as database primary keys, session identifiers, file names, transaction IDs, and anywhere you need a unique identifier without central coordination.

What's the difference between UUID and GUID?

GUID (Globally Unique Identifier) is Microsoft's implementation of the UUID standard. They are essentially the same thing — both are 128-bit unique identifiers following the same format.

UUID Generator

UUID Generator is a free online tool that helps you generate universally unique identifiers (UUIDs). Create single UUIDs or generate them in bulk, with uppercase/lowercase options and one-click copy — no signup, no installation, completely private.

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Generated UUIDs

Click generate to create UUIDs

UUID Validator

UUID Generator Guide

UUID v4: Random-based generation, the most commonly used UUID version with extremely low collision probability.

UUID v1: Timestamp and node ID-based generation with time-ordered properties.

UUID v7: Time-ordered UUID using Unix timestamp in milliseconds, sortable and modern.

Batch GenerationMultiple Formats

What is UUID Generator?

Generate UUID v4 (random) identifiers
Bulk generation — create up to 100 UUIDs at once
Uppercase and lowercase output options
One-click copy individual or all UUIDs
UUIDs generated using cryptographically secure random numbers
Real-time generation with no server round-trip
All processing happens locally in your browser

How to Use UUID Generator

1
Set quantity
Choose how many UUIDs to generate (1-100).
2
Choose format
Select uppercase or lowercase for the hex characters.
3
Generate UUIDs
Click the Generate button to create your UUIDs.
4
Copy results
Click the copy icon next to any UUID, or copy all at once.

UUID Generator

UUID Generator Guide

What is UUID Generator?

How to Use UUID Generator

Frequently Asked Questions

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UUID Generator

UUID Generator Guide

What is UUID Generator?

How to Use UUID Generator

Frequently Asked Questions

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