UUID Generator

UUID Generator is a free browser-based tool that helps you generate unique uuids (v4). It is part of ToolsMonk's developer tools collection, so you can finish the job without downloading software, creating an account, or jumping between multiple websites.

This tool is especially useful for workflows such as creating unique primary keys and identifiers for database records, generating correlation ids for logging and tracing requests, and producing unique keys for objects, files, or test fixtures. Because it runs directly in your browser, you can use it on desktop, tablet, or mobile while keeping the process fast and easy for one-off tasks as well as repeat work.

UUID Generator is designed for people who want a practical, privacy-friendly workflow with instant results inside the larger ToolsMonk library.

UUID Generator creates universally unique identifiers — 128-bit values written as 32 hexadecimal digits in five hyphen-separated groups. They're the standard way to label records and objects uniquely without needing a central authority to hand out IDs.

This tool produces version-4 (random) UUIDs, the most common general-purpose variant. Because they're generated from randomness rather than coordinated counters, they're ideal whenever data is created in multiple places at once — distributed systems, offline-first apps, microservices — where a shared auto-increment counter would be impractical or collision-prone.

Practical collisions are a non-issue: a v4 UUID carries 122 bits of randomness, so you would need to generate an astronomical number before a duplicate became likely. For real applications you can safely treat every generated value as unique.

Generation happens in your browser with secure randomness, so nothing is transmitted, and you can produce as many as you need for free. For large batches, the UUID Bulk Generator creates many at once, and the other ToolsMonk developer tools cover hashing, tokens, and encoding alongside it.