UUID Generator
Generate random UUID v4 identifiers, one or many at a time.
How this tool works
Set how many you need
Enter a count from 1 to 100 using the number field.
Generate instantly
UUIDs are produced immediately using your browser’s cryptographic random source.
Toggle case if needed
Switch between lowercase and UPPERCASE formatting with one click.
Copy them all at once
Use "Copy all" to grab the full list, one UUID per line, ready to paste into a seed script or spreadsheet.
Quick facts
- Category
- Generators
- Best for
- Generating unique database keys or request IDs
About this tool
Generate cryptographically random UUID v4 identifiers for use as database keys, request IDs, or unique tokens, with an option to generate anywhere from one up to 100 at once and copy them all in a single click. UUID v4 specifically means the identifier is built almost entirely from random bits (rather than being derived from a timestamp or a machine identifier, as other UUID versions do), which is why it’s the most common choice when you just need a unique value with no other meaning attached. Useful for seeding test data, generating IDs for new database rows before they’re persisted, or creating one-off tokens for a request or session. Runs entirely client-side using the browser’s own random number generator, so nothing about the generated values is logged or transmitted anywhere.
Why use this tool
Cryptographically random
Built on the Web Crypto API, not Math.random(), so IDs are suitable for real unique-identifier use.
Bulk generation
Generate up to 100 UUIDs in one pass instead of refreshing a single-ID tool repeatedly.
Standard v4 format
Output follows the RFC 4122 v4 layout that databases, APIs, and libraries expect.
Nothing logged
Generated values are never sent anywhere - each one exists only in your browser tab.
Frequently asked questions
A UUID (Universally Unique Identifier) is a 128-bit value used to uniquely identify information without requiring a central authority, commonly used as database primary keys.
UUID v4 values are generated using random or pseudo-random numbers. The chance of a collision is astronomically small — practically negligible for real-world use.
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