UUID generator

Generate UUID v4 (Universally Unique Identifiers) instantly. Perfect for databases, APIs, software development, and any application requiring unique identifiers.
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What is a UUID ?

A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. UUIDs are standardized by the Open Software Foundation (OSF) and are widely used in software development for creating unique identifiers without requiring a central authority.

Key Features

Instant Generation:
Generate UUIDs immediately with one click
UUID v4 Standard:
Follows RFC 4122 specification
One-Click Copy:
Copy generated UUIDs to clipboard instantly
Free to Use:
No registration or payment required
Secure & Random:
Uses cryptographically secure random generation
Cross-Platform:
Works on all devices and browsers

Technical Information

UUID Version:
Version 4 (random)
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Length:
36 characters (including hyphens)
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Format:
8-4-4-4-12 hexadecimal digits
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Uniqueness
Probability of collision is negligible (1 in 2^122)
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Common Use Cases for UUIDs

Database Primary Keys:
Use UUIDs as unique identifiers for database records
API Development:
Generate unique request IDs or resource identifiers
File Naming:
Create unique filenames to avoid conflicts
Session Management
Generate unique session tokens

How to Use the UUID Generator

Click the "Regenerate" button to generate a new UUID
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The UUID v4 will appear in the text field above
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Click the "Copy" button to copy the UUID to your clipboard
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Paste the UUID wherever you need it in your application
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Frequently Asked Questions

Are UUIDs truly unique ?
While theoretically possible, UUID collisions are extremely rare. UUID v4 has a collision probability of approximately 1 in 2^122, making them practically unique for most applications.
Can I use UUIDs as database primary keys ?
Yes, UUIDs make excellent primary keys, especially in distributed systems. They eliminate the need for auto-incrementing integers and avoid conflicts when merging databases.
Is this UUID generator secure ?
Yes, our generator uses cryptographically secure random number generation to ensure unpredictable and secure UUIDs suitable for production use.
Do I need to store UUIDs with or without hyphens ?
Both formats are valid. With hyphens (36 characters) is more readable, while without hyphens (32 characters) takes less storage space. Choose based on your specific requirements.