Click Generate to create UUIDs
How to Generate UUIDs
- 1Click "Generate" to create a random UUID v4.
- 2Set the count to generate multiple UUIDs at once (up to 100).
- 3Toggle "Uppercase" to get UUIDs in uppercase letters.
- 4Toggle "No dashes" to remove hyphens from the UUID format.
- 5Click "Copy" next to any UUID to copy it, or "Copy All" to copy all generated UUIDs.
Features
✓Generate cryptographically random UUID v4
✓Bulk generate up to 100 UUIDs at once
✓Option for uppercase output
✓Option to remove dashes (32-character hex string)
✓One-click copy for individual or all UUIDs
✓Uses Web Crypto API for true randomness
✓No server needed — generated in your browser
✓Each UUID is guaranteed to be unique
Frequently Asked Questions
What is a UUID?▼
A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. The most common version, UUID v4, is generated using random or pseudo-random numbers. UUIDs are formatted as 32 hexadecimal digits in five groups separated by hyphens: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx.
What is the difference between UUID and GUID?▼
UUID and GUID (Globally Unique Identifier) are essentially the same thing. UUID is the standard term used in most contexts, while GUID is the term historically used by Microsoft. They follow the same format and specification.
Are UUIDs truly unique?▼
UUID v4 uses 122 random bits, giving approximately 5.3 × 10^36 possible values. The probability of generating two identical UUIDs is astronomically low — about 1 in 2^122. For all practical purposes, they are unique.
When should I use UUIDs?▼
UUIDs are ideal for database primary keys, distributed systems, API identifiers, session tokens, file names, and any scenario where you need a unique identifier without a centralized authority.
Is this generator secure?▼
Yes. This tool uses the Web Crypto API (crypto.randomUUID()), which provides cryptographically strong random values. It is suitable for security-sensitive applications.