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Online UUID v4 (GUID) Generator

Generate up to 500 universally unique identifiers (UUID version 4, also called GUIDs) in one click, lowercase, uppercase or without hyphens. They are created with your browser's cryptographic generator.

🔗 Direct link sahlify.uk/en/uuid-generator/

How does it work?

Type or paste your data.
The result appears instantly.
Copy or download the result.

Why use UUID Generator?

✓ 100% free, no limits, no watermark
✓ No sign-up, no install
🔒 Files processed locally: full privacy
📱 Works on desktop, tablet and mobile

Frequently asked questions

Can two UUIDs be the same?

In practice no: the collision probability of a UUID v4 is negligible.

Are UUID and GUID the same?

Yes, GUID is Microsoft's name for the same format.

Can two UUIDs be identical?

The probability is so low it is negligible in practice.

Are they generated securely?

Yes, with the browser's cryptographic generator.

Is this tool really free?

Yes, 100% free, with no sign-up, no watermark and no usage limit.

Are my files safe?

Yes. Processing happens directly in your browser: your files are never uploaded to a server or stored.

When to use it

UUIDs (universally unique identifiers) let developers create database keys, order, session or file IDs with no risk of collision and no central server.

Our tips

💡 Version 4 is random and suits most uses.
💡 Generate them in bulk to fill a test database.
💡 For chronological sorting, prefer UUID v7 or a timestamp.