Free UUID Generator - Generate UUID v4 Online | ToolZen
Generate random UUID v4 identifiers with format options: case, hyphens, and wrapping. One or multiple at once.
Frequently Asked Questions
1. What is UUID v4?
UUID v4 is a version 4 Universally Unique Identifier. It is randomly generated and complies with RFC 4122. The probability of generating the same UUID twice is virtually zero.
2. How many UUIDs can I generate?
Unlimited. You can generate as many UUIDs as you need, instantly, with a single click. All generation is done locally in your browser.
3. What format are the UUIDs in?
UUIDs are generated in the standard format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, where x is any hexadecimal digit and y is one of 8, 9, a, or b.
Key Features
- Generate UUID v4 — RFC 4122 compliant UUID generation
- Format Options — Switch between lowercase/uppercase, with or without hyphens, wrapped in braces or parentheses
- Copy UUID — Click any UUID to copy instantly
- Bulk Generate — Generate multiple UUIDs at once
- One-Click Copy All — Copy all generated UUIDs at once
How to Use
Step 1: Configure
Set the number of UUIDs and choose format options: case (abc or ABC), hyphens (with or without), and wrapping (none, , or ( )).
Step 2: Generate
Click Generate to create UUIDs in your chosen format.
Step 3: Copy
Click any UUID text to copy it to clipboard, or click Copy All to copy all at once.
Use Cases
Database IDs
Generate unique identifiers for database records.
API Testing
Create unique IDs for API testing and development.
Session Tokens
Generate unique session identifiers for applications.
Why Choose ToolZen?
| Feature | ToolZen | Others |
|---|---|---|
| Privacy | 100% Client-Side | Data to Server |
| Cost | Free | Freemium |
| Signup | No | Required |
| Generation | Single + Bulk | Single Only |