UUID Generator
Generate cryptographically secure Version 4 UUIDs (GUIDs) conforming to RFC 4122 in bulk with custom casing and hyphens.
Ready to generate UUIDs
Configure options above and click Generate to create cryptographically secure UUIDs (v4) right in your browser.
How to Use UUID Generator
- Set Quantity: Specify how many UUIDs you want to generate in a single batch (from 1 to 500).
- Configure Formatting: Choose lowercase or UPPERCASE letters, and toggle standard hyphens or enclosing braces '{...}'.
- Generate UUIDs: Click 'Generate UUIDs' to create cryptographically random identifiers.
- Copy All or Download: Click 'Copy All' to copy the list to your clipboard or 'Download as .txt' to save the identifiers.
Frequently Asked Questions
Are these generated UUIDs cryptographically secure?
Yes! Identifiers are produced using the browser's native window.crypto.randomUUID() API, backed by your operating system's cryptographic CSPRNG entropy pool.
What version of UUID is generated?
We generate RFC 4122 Version 4 UUIDs, which provide 122 bits of pseudo-random entropy.
Is there any chance of UUID collision?
The probability of generating two identical UUID v4 identifiers is approximately 1 in 2.71 quintillion, making collisions practically impossible in real-world applications.
What is the difference between a UUID and a GUID?
GUID (Globally Unique Identifier) is Microsoft's implementation term for UUID (Universally Unique Identifier). They represent the exact same 128-bit structure.
Can I generate UUIDs without hyphens?
Yes, uncheck the 'With Hyphens' box to output compact 32-character hexadecimal strings.
How many UUIDs can I generate at once?
You can generate up to 500 UUIDs per click in bulk.