🆔 Generator Tools

UUID Generator

Generate RFC 4122 compliant UUID v4 identifiers. Single or bulk generation.

Options

Count

Format

Output

About UUID v4

UUID v4 identifiers are randomly generated 128-bit values formatted as 32 hexadecimal digits in the pattern xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx. They are statistically guaranteed to be unique and are widely used as database primary keys, session IDs, and request identifiers. Generated using the browser's crypto API for true randomness.

How to Use the UUID Generator

Set the count

Enter how many UUIDs you need — from 1 to 100 at a time.

Choose format

Select standard hyphenated format, without hyphens, uppercase, or wrapped in braces.

Generate and copy

Click Generate and copy all UUIDs to clipboard with one click.

Common Use Cases

✓Generate primary keys for database records
✓Create unique session IDs for web applications
✓Generate request IDs for API logging
✓Create unique filenames for uploaded files
✓Generate correlation IDs for distributed systems

Frequently Asked Questions

What is a UUID?+

UUID stands for Universally Unique Identifier. It is a 128-bit value formatted as 32 hexadecimal digits that is statistically guaranteed to be globally unique.

What is UUID v4?+

UUID v4 is randomly generated. It is the most common type used in software because it requires no coordination between systems to guarantee uniqueness.

Can two generated UUIDs ever be the same?+

Theoretically possible but statistically near impossible. The probability is so low it is considered safe to treat them as unique in any real application.

Are these UUIDs cryptographically secure?+

Yes. They are generated using the browser's crypto.getRandomValues API which is a cryptographically secure random number generator.