UUID Generator
Generate random v4 UUIDs instantly. Perfect for database keys, API tokens, and unique identifiers.
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📊 Generated
No UUIDs yet
🎯 Format
lowercase
🔒 Privacy
All generation happens in your browser. No data is ever sent to any server.
Secure & Fast Online UUID Generator
A Universally Unique Identifier (UUID) is a 128-bit identifier used in software development to uniquely identify information without requiring centralized coordination. UUIDs are standard in databases, APIs, and distributed systems. This tool generates UUID v4 (random) identifiers using crypto.getRandomValues() directly in your browser.
🔒 Zero Server Exposure
Unlike online tools that route your data through backend APIs, OptMyTool generates UUIDs locally in browser memory using native crypto.getRandomValues().
📦 Batch Generation
Generate up to 100 UUIDs at once with configurable count and format (lowercase or UPPERCASE).
Frequently Asked Questions
What does UUID stand for?
UUID stands for Universally Unique Identifier. It is a 128-bit identifier standardized by the Open Software Foundation (OSF).
What is the difference between UUID v1 and v4?
UUID v1 is time-based (uses timestamp and MAC address), while v4 is randomly generated. v4 is more common for general use because it does not reveal network information.
Is my data secure when using this UUID generator?
Yes! All UUID generation happens in your browser using crypto.getRandomValues(). No data is ever sent to any server. Your UUIDs are completely private.
How many UUIDs can I generate at once?
You can generate up to 100 UUIDs at once. For larger batches, generate multiple times and combine the results.