UUID Generator

Our advanced UUID Generator is a versatile tool for developers and testers to create RFC 4122-compliant Universally Unique Identifiers (UUIDs) instantly. Whether you need a standard random UUID v4, a time-based UUID v1, or a deterministic name-based UUID v5, this tool handles it all directly in your browser. It includes features for bulk generation, custom formatting (uppercase, braces, no hyphens), and validation to check if a UUID is correct and identify its version. All generation happens locally for maximum speed and privacy.

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Key Features

Support for UUID v1, v4 & v5

Generate random UUIDs (v4) for general use, time-based UUIDs (v1) for chronological sorting, and namespace-based UUIDs (v5) for deterministic IDs.

Bulk UUID Generation

Generate up to 1000 UUIDs at once in a single click, perfect for populating databases, testing APIs, or creating mock data sets.

Custom Formatting Options

Customize your UUID output with options for Uppercase, No Hyphens (clean hex), and Braced format (Microsoft style GUIDs).

UUID Validator & Version Detector

Paste any string to instantly validate if it is a proper UUID and automatically detect whether it is version 1, 3, 4, or 5.

History & Clipboard Tools

Automatically saves your recently generated UUIDs for quick access and allows one-click copying to clipboard.

How to Use UUID Generator

  1. 1Select the UUID Version you need (v4 is standard for most cases).
  2. 2For bulk generation, enter the quantity (up to 1000).
  3. 3For v5, enter a Namespace UUID and a Name string.
  4. 4Choose your preferred format (Standard, Uppercase, etc.).
  5. 5Click Generate to see your UUIDs.
  6. 6Use the Validator tab to check existing UUIDs.

Common Use Cases

1

Database Primary Keys

Use UUIDs as unique primary keys in databases to ensure global uniqueness across distributed systems without collision risks.

2

API Keys & Session Tokens

Generate secure, random tokens for API authentication, user sessions, and tracking IDs in web applications.

3

Deterministic ID Generation

Use UUID v5 to create consistent, reproducible IDs based on a name and namespace, useful for mapping external data to internal IDs.

Frequently Asked Questions

UUID (Universally Unique Identifier) is a 128-bit label used for information in computer systems. It allows distributed systems to uniquely identify records without central coordination.
UUID v1 is generated using the current timestamp and MAC address, ensuring uniqueness in time and space. UUID v4 is generated using random numbers and is the most common version for general use.
UUID v5 is deterministic, meaning it always produces the same UUID for the same namespace and name input. It is useful for creating consistent IDs from data.
While not theoretically impossible, the probability of a collision (two same UUIDs) is astronomically low. For v4, the chance is so small that it is considered safe for all practical purposes.
Yes. All UUID generation and validation happens strictly in your browser using JavaScript. No data is sent to any server.

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