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Home Developer ToolsUUID Generator

🆔⚡ Developer Tools

UUID Generator

Generate random UUIDs instantly.

Choose a count and generate UUIDs.

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What's next?

⏱️Cron Expression Parser 📁.gitignore Generator 🧾CSV ↔ JSON Converter

Free Online UUID Generator

Generate cryptographically random UUID v4 identifiers instantly in your browser — no upload to any server and no account required. Generate one or dozens at once.

Back-end developers generate UUIDs for database primary keys to avoid sequential ID enumeration. Front-end developers create unique keys for React list items or form fields. DevOps engineers generate correlation IDs for distributed tracing.

How to Use

1Click Generate to produce a UUID.
2Click the copy icon to copy it to your clipboard.
3Generate in bulk by setting the quantity before clicking.

Frequently Asked Questions

Are UUIDs sent to a server?

No. UUID v4 generation uses the browser's Web Crypto API (crypto.randomUUID or crypto.getRandomValues). Nothing leaves your device.

Are these UUIDs truly unique?

UUID v4 uses 122 bits of cryptographic randomness. The probability of a collision is astronomically small — approximately 1 in 5 undecillion.

What is a UUID v4?

UUID v4 is a randomly generated 128-bit identifier formatted as 8-4-4-4-12 hexadecimal characters, e.g. 550e8400-e29b-41d4-a716-446655440000.

Can I use UUIDs as database primary keys?

Yes. UUIDs are widely used as primary keys because they are globally unique across tables, databases, and systems.

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