Unique identifiers are the backbone of distributed systems. Every database record, API resource, event log entry, and session token needs a way to be uniquely identified without coordination between systems. Generator tools create these identifiers instantly, right in your browser.
**UUID (Universally Unique Identifier)** is the most widely used identifier format. A UUID is a 128-bit number, typically displayed as 32 hexadecimal characters in the pattern xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx. The chance of generating a duplicate UUID v4 is astronomically small — you would need to generate 1 billion UUIDs per second for 85 years to have a 50% chance of a single collision.
Our UUID generator supports three versions. **UUID v4** is purely random, generated from cryptographically secure random numbers — the go-to choice for most applications. **UUID v1** incorporates a timestamp and a node identifier, providing rough ordering but potentially exposing system information. **UUID v7** is the modern choice for database primary keys — it embeds a Unix timestamp in the first 48 bits, making UUIDs sortable by creation time while maintaining randomness in the remaining bits. This gives you the uniqueness of UUIDs with the database indexing benefits of sequential IDs.
Bulk generation is essential for seeding databases, creating test fixtures, or preparing data migration scripts. Our tool generates up to 100 UUIDs at once in your chosen format: lowercase, uppercase, with braces for C# GUIDs, or without hyphens for compact storage.
All generation happens client-side using the Web Crypto API. This means your generated identifiers are cryptographically random and never pass through any server. The tool also includes a UUID validator — paste any string to check if it is a valid UUID and detect which version it is.
Whether you are scaffolding a new database schema, building a microservices architecture, creating test data, or just need a quick unique identifier for a one-off script, these generator tools eliminate the friction of writing throwaway code for a common need.