UUID Generator
Generate cryptographically secure UUID v4 (random) and UUID v7 (time-ordered) identifiers with custom casing and batch options.
How to Use UUID Generator
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Select version & quantity
Choose between standard random v4 UUIDs or timestamp-ordered v7 UUIDs, and select the quantity you need (up to 50 at once).
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Customize formatting
Toggle uppercase letters, remove hyphens for raw hex strings, or wrap in curly braces according to your database or programming language needs.
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Copy or export
Click any individual UUID to copy it instantly, click "Copy All" to copy the entire batch to your clipboard, or download as a .txt file.
Database Primary Key Example
Version: v7 (Time-Ordered), Format: Lowercase with Hyphens018f2d5e-8b3a-7921-9d41-e739f4a1802bUUID v7 begins with timestamp bytes, guaranteeing chronological ordering in database indexes without sequential ID enumeration attacks.
Technical Specifications
- Supported Inputs: UUID v4, UUID v7, Raw Hex, Braced GUID
- Input Limit: 50 IDs / batch
- Processing Engine: 100% In-Browser (Web Crypto API)
- Content Uploads: None (Your files and text are processed locally on your device with zero uploads)
Privacy & Security Guarantee
Your identifiers are processed entirely in your web browser's memory using native client-side web technologies. Unlike traditional cloud tools, your content is never uploaded to remote servers, stored on external disks, or analyzed by third parties.
2ClickKit In-Browser vs Traditional Cloud Tools
| Feature | 2ClickKit (In-Browser) | Traditional Cloud Services |
|---|---|---|
| Data Privacy | Files never leave your local device | Uploaded to remote servers and third-party clouds |
| Processing Speed | Instant local execution (0ms upload time) | Constrained by internet upload & server processing queues |
| Account & Costs | 100% Free with zero registration or paywalls | Tiered subscriptions, limits, or forced sign-ups |
Best Practices & Tips
- Use UUID v7 when inserting records into relational databases (PostgreSQL, MySQL, SQLite) to avoid index fragmentation.
- If you need compact GUIDs for URLs, uncheck "Include Hyphens" to reduce length from 36 down to 32 characters.
Frequently Asked Questions
What is the difference between UUID v4 and v7?
UUID v4 is completely random (122 random bits). UUID v7 embeds a 48-bit Unix epoch millisecond timestamp at the front followed by random bits, making v7 identifiers sortable in database indexes and B-trees for superior database insert performance.
Can two generated UUIDs ever collide?
The collision probability of UUID v4 is 1 in 5.3 × 10^36. You would need to generate 1 billion UUIDs every second for approximately 85 years to have a 50% probability of a single collision.
Are UUIDs generated on a server?
No. Identifiers are generated directly in your browser using the cryptographically secure Web Crypto API (`crypto.getRandomValues`). Zero data is sent across the internet.