UUID Generator
Developer ToolsGenerate UUID v4 identifiers
Click Generate to create UUIDs...
Nil UUID
00000000-0000-0000-0000-000000000000Max UUID
ffffffff-ffff-ffff-ffff-ffffffffffffAbout UUID Generator
Generate UUID v4 identifiers instantly. Supports bulk generation, format options, and UUID validation. Perfect for developers and database work.
Frequently Asked Questions
What is a UUID v4?
A UUID v4 (Universally Unique Identifier version 4) is a 128-bit identifier generated using random or pseudo-random numbers. It follows the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, where "4" indicates the version and "y" is one of 8, 9, a, or b. The probability of generating a duplicate is astronomically low.
How are these UUIDs generated?
This tool uses the Web Crypto API via crypto.randomUUID(), which produces cryptographically strong random values. This ensures each UUID is unique and unpredictable, suitable for use as database primary keys, session tokens, or tracking identifiers.
Can I generate multiple UUIDs at once?
Yes. You can bulk generate between 1 and 100 UUIDs in a single click. Choose your desired count, select a format (lowercase, uppercase, or no hyphens), and click Generate to create them all instantly.
Is my data safe?
Yes! All processing happens entirely in your browser. Your UUIDs are generated locally using the Web Crypto API. No data is collected, stored, or transmitted to any server.
How do I validate a UUID?
Paste any string into the validator section and the tool will check whether it matches the UUID v4 format. It verifies the correct length, hyphen placement, version digit (4), and variant bits (8, 9, a, or b) to confirm validity.
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