extensionUUID / GUID Generator OnlineUUID / GUID Generator Online

A UUID (Universally Unique Identifier) or GUID (Globally Unique Identifier) is a 128-bit number used to uniquely identify something in software systems. There are different versions and variants of UUIDs, which determine how they’re generated and formatted.

compareUUID Version Comparison

Version	Description	Example Use
v1	Time-based UUID (includes timestamp + MAC address)	Tracking events in time order
v3	Name-based (MD5 hash of namespace + name)	Consistent IDs from names
v4	Random-based (pure random bits)	Most common — simple random ID
v5	Name-based (SHA-1 hash of namespace + name)	More secure version of v3

check_circleUUID v4 is the most common and is generated randomly.

check_circleUUID v1 can be used to extract creation timestamps.

check_circleUUID v3/v5 are deterministic for the same name/namespace.

psychologyWhy Use Our Professional UUID/GUID Generator?

Generate RFC4122-compliant UUIDs instantly with our comprehensive online UUID generator and validator. Perfect for developers, database administrators, API development, and distributed systems architecture.

🚀 Advanced UUID Generation Features

Multiple UUID Versions: Generate v1 (timestamp), v3 (MD5), v4 (random), and v5 (SHA-1) UUIDs
Bulk Generation: Create up to 100 UUIDs simultaneously for large-scale projects
UUID Validation: Verify UUID format, extract version info, and decode timestamps
Multi-Format Export: Download UUIDs as JSON, CSV, or plain text files
Namespace Support: Use standard DNS, URL, OID, and X.500 namespaces for v3/v5
One-Click Copy: Copy individual UUIDs or entire batches to clipboard

💼 Professional Use Cases

Database Primary Keys

Generate unique identifiers for database records, avoiding collisions in distributed systems

API Development

Create unique request IDs, session tokens, and correlation identifiers for microservices

File & Resource Management

Generate unique filenames, asset IDs, and resource identifiers for cloud storage

Testing & QA

Create test data, mock IDs, and unique identifiers for automated testing suites

RFC4122 compliant UUIDs for maximum compatibility across platforms
Cryptographically secure random number generation for v4 UUIDs
Deterministic generation for v3/v5 ensuring consistency across systems
Timestamp extraction from v1 UUIDs for audit trails and debugging
Bulk export capabilities for integrating with existing workflows
Client-side generation - no data sent to servers for maximum privacy

Pros:

Generate millions of unique IDs without collisions
Support for all standard UUID versions (v1, v3, v4, v5)
Bulk generation up to 100 UUIDs at once
Export in multiple formats (JSON, CSV, TXT)
Validate existing UUIDs and extract metadata
Namespace support for consistent v3/v5 generation
Works offline - completely client-side processing

Cons:

v1 UUIDs may expose MAC address information
Large bulk generations may be slow in older browsers
v3/v5 require proper namespace understanding

How to use:

Select your desired UUID version (v1, v3, v4, or v5).
For v3/v5: Choose a namespace and provide a name string.
Set the quantity of UUIDs to generate (1-100).
Click Generate to create your UUIDs instantly.
Copy individual UUIDs or download the entire batch.
Use the Validator tab to verify existing UUIDs.

Did you know? UUIDs are globally unique across space and time, making them perfect for distributed systems where coordination is impossible!

starPro Tip: Use v4 for general purposes, v1 when you need timestamps, and v5 for consistent name-based IDs!

infoWhy Use a UUID Generator?

Ensure uniqueness for database keys, API tokens, and distributed systems.
Prevent collisions in large-scale or collaborative projects.
Easy integration for software development, testing, and automation.
Export UUIDs in multiple formats for flexible usage.
Fast, secure, and privacy-friendly—no data is stored or shared.