UUID Generator

Generate UUID v4 (random) and UUID v7 (timestamp-based) identifiers. Bulk generate up to 100 at once with format options.

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier that is guaranteed to be unique across space and time. UUIDs are formatted as 32 hexadecimal characters separated by hyphens (e.g., 550e8400-e29b-41d4-a716-446655440000). They are widely used in databases, distributed systems, and APIs as primary keys and identifiers because they can be generated independently without a central authority.

This tool generates UUID v4 (random) and UUID v7 (time-ordered) identifiers, with options for bulk generation and different output formats.

How to Use This UUID Generator

Choose the version — Select UUID v4 (random) or UUID v7 (time-ordered, sortable).

Set the quantity — Generate a single UUID or up to 100 at once for bulk needs.

Choose format options — Select standard (with hyphens), without hyphens, uppercase, or braces format.

Generate — Click the generate button to create your UUIDs instantly.

Copy — Use the copy button to copy all generated UUIDs to your clipboard.

Common Use Cases

Database primary keys — Use UUIDs as primary keys in databases to avoid sequential ID conflicts in distributed systems.

API resource identifiers — Generate unique IDs for API resources, sessions, or transactions.

Distributed systems — Create unique identifiers across multiple services without coordination or central ID generation.

Testing and development — Quickly generate test data with unique identifiers for development and QA environments.

Frequently Asked Questions

What is the difference between UUID v4 and UUID v7?

UUID v4 is generated using random numbers, making each UUID completely unique with no embedded information. UUID v7 embeds a Unix timestamp in the first 48 bits, making them sortable by creation time while still being unique. UUID v7 is preferred for database primary keys because of its time-ordered nature.

Are generated UUIDs unique?

Yes. UUID v4 uses 122 random bits, making the probability of a collision astronomically low (about 1 in 2^122). For practical purposes, every UUID generated is guaranteed to be unique across all systems worldwide.

Can I generate multiple UUIDs at once?

Yes. Use the bulk generation feature to generate up to 100 UUIDs at once. You can choose between v4 and v7, select uppercase or lowercase format, and copy all generated UUIDs with a single click.