Free Online UUID / GUID Generator
Generate random UUID v4 identifiers instantly. Bulk generation supported.
Part of the Productivity Tools hub. Explore related workflows and supporting tools there.
What is UUID Generator?
A UUID (Universally Unique Identifier), also called a GUID (Globally Unique Identifier), is a 128-bit identifier designed to be unique across all space and time. UUID version 4 (the most common) is randomly generated, making collisions practically impossible.
A UUID (Universally Unique Identifier), also called a GUID (Globally Unique Identifier), is a 128-bit identifier designed to be unique across all space and time. UUID version 4 (the most common) is randomly generated, making collisions practically impossible.
UUIDs are used extensively in software development as primary keys in databases, session identifiers, file names for uploaded assets, API resource identifiers, and anywhere a unique identifier is needed without a central authority assigning IDs.
Our free UUID generator creates version 4 UUIDs using the browser's cryptographically secure random number generator. You can generate up to 50 UUIDs at once, choose uppercase or lowercase output, and optionally strip the hyphens.
How to Use This UUID Generator
- Select how many UUIDs to generate (1, 5, 10, 25, or 50)
- Choose uppercase or lowercase format
- Toggle hyphens on or off
- Click Generate to create your UUIDs
- Copy individual UUIDs or use Copy All
Why Use This Tool
UUID v4 (random) generation
Bulk generation up to 50 UUIDs
Uppercase and lowercase options
Option to remove hyphens
Individual and bulk copy buttons
Cryptographically secure randomness
Frequently Asked Questions
What is UUID v4?
UUID version 4 is randomly generated using a cryptographically secure random number generator. It has 122 bits of randomness, making collisions astronomically unlikely.
What is the difference between UUID and GUID?
They are the same thing. UUID is the open standard term, while GUID (Globally Unique Identifier) is Microsoft's term for the same concept.
Are generated UUIDs truly unique?
The probability of generating two identical UUID v4s is negligible — roughly 1 in 5.3 × 10^36. For all practical purposes, they are unique.
Can I use these UUIDs as database primary keys?
Yes. UUIDs are widely used as database primary keys, especially in distributed systems where auto-incrementing IDs would cause conflicts.
Tool Interface
UUID Generator: EasyUtilize vs. alternatives
| Feature | EasyUtilize | Other online tools | Desktop software |
|---|---|---|---|
| Cost | Free, no limits | Free tier + paid upsells | $10–$50+ license |
| Data privacy | 100% browser-side | Server upload typical | Local processing |
| Account required | No | Often yes | License activation |
| Installation | None — runs in browser | None | Download + install |
| Speed | Instant (client-side) | Depends on server load | Fast (native) |
| Mobile friendly | Yes — responsive UI | Varies | Desktop only |
Need more tools?
Build your workflow with EasyUtilize
Jump into other calculators, generators, and converters without leaving this page. All tools run locally in your browser.
About UUID Generator
UUID Generator is a free, browser-based utility that helps you generate random uuid v4 identifiers instantly. bulk generation supported. It belongs to our Generators collection.
This tool is used by writers, developers, marketers, students, and content creators who need fast, reliable text processing without installing software or creating accounts. All processing happens locally in your browser — your data never leaves your device.
Quick Start Guide
- 1
Paste or type your input
Enter your text, data, or content into the input area above.
- 2
Configure options
Adjust any settings or toggle options to customize the output.
- 3
View results instantly
Results appear in real time as you type — no need to click a button.
- 4
Copy or download
Use the Copy button to copy results to your clipboard, or Download to save as a file.
Who Uses UUID Generator?
Content Writers
Polish and format text for blogs, articles, and social media posts.
Software Developers
Process strings, encode data, and format code-related text quickly.
Students & Researchers
Analyze text, count words, and prepare documents for submission.
SEO & Marketing Pros
Optimize content, generate slugs, and analyze keyword density.
General Questions
Is this tool completely free?
Yes. UUID Generator is 100% free with no usage limits, no ads gating features, and no premium tier. You can use it as many times as you want.
Is my data safe?
Absolutely. All processing happens locally in your browser using JavaScript. Your text is never uploaded to any server, stored in any database, or shared with any third party.
Do I need to create an account?
No. There is no signup, login, or registration required. Just open the tool and start using it immediately.
Deep dives
Learn more about UUID Generator
Blog insight
UUID vs GUID Explained for Modern Teams
Understand how UUIDs and GUIDs overlap, when casing matters, and how to document identifier standards for distributed systems.
Blog insight
Essential Online Tools Every Developer Needs
A comprehensive roundup of online developer tools for encoding, formatting, hashing, debugging, and more — all free and available in your browser.
Blog insight
Best Free Online Tools for Developers (2025 Update)
From JSON formatting to hash generation and regex testing, here are the free online tools developers rely on—and how to connect them to compare pages and guides.