◆
SWutils
Tools
Features
FAQ
🎲
UUID/GUID Generator
Generate v4 and v1 UUIDs with multiple format options
Generation Settings
UUID Version
UUID v4 (Random)
UUID v1 (Timestamp)
Format
Standard (with hyphens)
No Hyphens
With Braces {}
Uppercase
Quantity
Generate
Regenerate One
Clear
Output
Click "Generate" to create UUIDs...
📋 Copy All
Download
About UUID Generator
What is a UUID?
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A UUID (Universally Unique Identifier) is a 128-bit identifier that is almost certainly unique. Used in databases, APIs, and distributed systems.
What's the difference between v4 and v1?
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v4 (Random):
Based on random numbers, no predictability.
v1 (Timestamp):
Based on timestamp and MAC address, sortable by time.
When should I use UUID v4?
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Use v4 for most cases. It's random and has no information leakage. Recommended for security-sensitive applications.
When should I use UUID v1?
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Use v1 when you need sortable UUIDs or have a distributed system that needs to track creation time.
How many can I generate?
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You can generate up to 100 UUIDs at once. For more, generate multiple batches.
Are these UUIDs truly unique?
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Yes, v4 UUIDs have 2^122 possible values. The probability of collision is astronomically small.