CUID Generator

The CUID Generator creates collision-resistant unique identifiers (CUIDs) optimized for horizontal scaling, sequential ordering, and URL-safe usage across distributed systems. Unlike UUIDs, CUIDs encode a timestamp, fingerprint, and random component in a way that makes them monotonically sortable and safe to generate on any node without coordination. CUID2, the newer variant, uses a SHA-3-based hash for stronger collision resistance and improved security properties. This tool is the fastest way to generate production-ready CUIDs for databases, APIs, or session management without adding a library dependency.

Browse all Generator tools

How to Use

Click Generate to create a new CUID or CUID2 instantly — select which variant you need from the options panel. Specify a batch count to generate multiple identifiers at once for bulk database seeding or testing. Each generated ID is displayed with its timestamp component decoded, and you can copy any individual ID or the entire batch to clipboard with a single click.

Common Use Cases

• •Full-stack developers generating collision-resistant primary keys for distributed PostgreSQL or MongoDB records without relying on database-managed auto-increment sequences
• •Microservice architects creating unique, sortable request or correlation IDs that can be generated on any service node without a centralized ID service
• •Frontend developers producing URL-friendly, human-readable IDs for user-facing resources like public profiles, share links, or shareable document URLs
• •Event-sourcing system designers assigning monotonically sortable identifiers to domain events so they can be replayed in exact creation order
• •Security-conscious developers replacing sequential auto-increment IDs in public APIs to prevent enumeration attacks that expose total record counts

Take a break and play free browser games