UUID Generator Online Free - Generate UUID v4 Fast
Generate UUID v4 values online for free. Create unique identifiers fast for apps, databases, APIs, and testing workflows.
Number of UUIDs: 1
Case Format
UUID v4 generates random 128-bit identifiers. The format is xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where x is any hex digit and 4 is the version.
No UUIDs generated yet
Configure your settings and click "Generate UUIDs" to get started
Common Use Cases
• Database primary keys
• API request identifiers
• Session tokens
• File naming
Best Practices
• Use UUID v4 for randomness
• Store as strings, not binary
• Consider indexing performance
• Use lowercase for consistency
Popular search phrases
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Guides & Resources
Learn how to use this tool effectively with our comprehensive guides and tutorials.
How to Generate Strong Passwords and UUIDs for Apps
Cover secure password creation and UUID generation for production apps, APIs, and testing workflows.
How to Format JSON, Decode Base64, and Fix API Payloads
Help developers clean API responses, inspect encoded strings, and resolve formatting issues without leaving the browser.
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Frequently Asked Questions
Find answers to common questions about this tool
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. It is typically represented as 32 hexadecimal digits displayed in five groups separated by hyphens.
What version of UUID does this generator create?
This tool generates UUID version 4 (UUID v4), which uses random numbers to create identifiers that are practically guaranteed to be unique.
How many UUIDs can I generate at once?
You can generate up to 100 UUIDs in a single operation, making it easy to get multiple identifiers for testing or bulk operations.
Is this UUID Generator free?
Yes. You can generate unlimited UUIDs online for free without any registration required.
Are the generated UUIDs stored or shared?
No. All UUID generation happens in your browser, and the identifiers are never sent to any server or stored permanently.
Can I use UUID Generator online for free?
Yes. You can use uuid generator online for free with no signup or paid plan required.