UUID Generator
Generate random UUIDs (v4) with formatting options
Click Generate to create UUIDs
Uses crypto.randomUUID() for cryptographically secure generation.
About UUID Generator
Generate universally unique identifiers (UUIDs) directly in your browser using cryptographically secure randomness. UUID v4 values are produced via the Web Crypto API, ensuring high entropy without relying on any server. UUIDs are essential for distributed systems, database primary keys, session tokens, and message correlation where globally unique identifiers are needed without central coordination. This tool lets you generate single or bulk UUIDs instantly, copy them to your clipboard, and choose formatting options such as uppercase or braces. Because everything runs client-side, your generated IDs never leave your device.
How to Use UUID Generator
- Open the UUID Generator tool and click Generate to create a new UUID v4.
- Adjust the quantity to generate multiple UUIDs in bulk.
- Toggle formatting options like uppercase or braces to match your project conventions.
- Click the copy button to copy the generated UUIDs to your clipboard.
UUID Generator FAQ
Which UUID version does this tool generate?
It generates UUID v4 values using the browser Web Crypto API for cryptographic randomness.
Can I generate multiple UUIDs at once?
Yes, you can set a quantity and generate UUIDs in bulk, then copy the entire list.
Are the generated UUIDs truly unique?
UUID v4 has 122 random bits, making the probability of a collision astronomically low — far less than one in a billion even at massive scale.
What are UUIDs commonly used for?
UUIDs are used as database primary keys, distributed system identifiers, session tokens, API request IDs, and anywhere a globally unique value is needed without a central authority.
Is any data sent to a server?
No. UUID generation happens entirely in your browser using the Web Crypto API. Nothing is transmitted over the network.
How do I generate multiple UUIDs at once?
Set the desired count and generate a batch of unique identifiers instantly. Every value uses the Web Crypto API, so bulk generation stays cryptographically secure and fully client-side.
Are these UUIDs RFC 4122 compliant?
Yes. The generated version 4 UUIDs follow the RFC 4122 layout, including the correct version and variant bits, so they are valid wherever standards-compliant UUIDs are expected.