How to quickly generate unique and standardized identifiers in scenarios such as system development, data processing, or information tagging? This free online UUID generation tool supports a variety of customization options, including UUID version selection (v1/v4), case format, separator control, batch generation quantity, etc. It is designed for programmers, database engineers, and automation tool developers. No installation is required, one-click generation, and immediate use.

What is UUID?

UUID (Universally Unique Identifier) is a 128-bit identifier in a standard format designed to ensure the uniqueness of objects in distributed systems. It is widely used in databases, network communications, system logs, microservice architectures, and other fields.

UUID can be generated without relying on a central server. Different versions represent different generation mechanisms, such as:

• UUID v1: Based on timestamp and node information (such as MAC address)

• UUID v4: Based on high-intensity random numbers, the probability of collision is extremely low

📚 Authoritative reference documents:

• Wikipedia introduction: UUID – Wikipedia

• Official standard: RFC 4122 - A Universally Unique IDentifier (UUID) URN Namespace

I. Inspiration:

UUID (Universally Unique Identifier) is widely used in system design, log tracking, API development, data deduplication, distributed communication, etc., but many developers still need to generate it through command line tools or programming library calls, which is not friendly enough for temporary testing, lightweight processing or non-development users. Therefore, we developed this online generation tool that supports UUID v1 and v4. It does not require writing code and can complete the generation of multiple identifiers in just a few seconds. It supports format customization, and the interface is lightweight, safe and reliable.

2. Usage:

Get the unique identifier you need quickly in just a few steps:

• Select UUID version: v1 (based on timestamp) or v4 (based on random numbers)

• Set format parameters: whether to capitalize, whether to include hyphens (-)

• Select the number of UUIDs to be generated: supports batch generation of 1 to 20 UUIDs at one time

• Click Generate → One-click copy and use

• No need to log in or download, suitable for desktop and mobile devices.

3. Application scenarios:

This UUID batch generator is suitable for the following typical scenarios:

• Generate temporary tokens in Web system or API interface development

• Database table primary key design (instead of auto-increment ID)

• Log file or data file naming maintains uniqueness

• Front-end and back-end interface request identifier

• Unique transaction ID in distributed system

4. Implementation principle:

This tool uses java-uuid-generator（JUG） to implement the core logic. This project is a well-known UUID generation library in the Java ecosystem, supporting multiple UUID generation strategies including time-based (v1) and random-based (v4).

We encapsulate it into a simple and practical online web tool based on it, retaining its stability and authority, and combining it with Spring Boot to provide an API interface to ensure that the generated results are standardized, unique, and verifiable, and keep the front-end response speed extremely fast, adapting to multi-language environments and different devices.

Whether you are looking for an online UUID v4 generation tool, a unique identifier generator that supports timestamp UUID, or a batch UUID online generation platform with a customizable format, this tool can provide you with safe, efficient, and professional service support to help development and data processes more reliable.