UUID / GUID Generator
Generate bulk cryptographically secure v4 (random) and v7 (time-ordered) UUID keys offline.
About UUID Generator Free — Generate Random v4 UUIDs & GUIDs
Generate universally unique identifiers (UUIDs) for database primary keys, API transactions, mock testing data, and distributed systems architecture.
Key Features & Capabilities
- Generate cryptographically strong RFC4122 v4 UUIDs
- Bulk generate up to 500 unique UUIDs at once
- Toggle hyphens, uppercase/lowercase, and braces
- Export as JSON array, CSV list, or plain text
- 100% private — generated via browser Web Crypto API
How to Generate UUIDs Online
Step 1: Set Quantity
Choose how many UUIDs you need (1 to 500).
Step 2: Configure Formatting
Select uppercase/lowercase and whether to include hyphens.
Step 3: Copy or Download
Copy all generated UUIDs to your clipboard.
Frequently Asked Questions
Are the generated UUIDs truly unique and secure?
Yes, they are generated using crypto.getRandomValues(), providing cryptographically secure randomness with negligible collision probability.
Are generated UUIDs stored anywhere?
No, UUIDs are generated directly inside your browser session.
Related Utility Tools
Why Zaeyon?
Private, free, and browser-based — no account, no uploads, no compromises.
Zero Uploads
Your files never leave your device. All processing happens locally in your browser memory — nothing is sent to any server.
100% Free Forever
No subscriptions, no hidden fees, no daily limits. Every tool on Zaeyon is permanently free to use without an account.
Instant & Powerful
Powered by WebAssembly — the same low-level technology used in native apps — so processing is fast even for large files.
Works Offline
Once the page loads, the WebAssembly engine runs entirely on your device. No internet connection needed to process files.
Works Everywhere
No software installation required. Runs directly in your browser on Windows, Mac, Linux, iOS, and Android.