UUID Generator
Generate cryptographically unique UUIDs instantly. Bulk generate up to 500 at once. Everything runs in your browser.
Randomly generated, most secure.
Generated 10 UUIDs
Paste any UUID to check if it's valid and what version it is.
How to Use the UUID Generator
Choose UUID version (v4 for random, v1 for time-based), output format, and how many you need.
Click "Generate UUIDs" — the single UUID at the top updates, and the full list appears below.
Copy individual UUIDs, copy all at once, or download the entire list as a .txt file.
Frequently Asked Questions
What is a UUID?
UUID (Universally Unique Identifier) is a 128-bit identifier used in software to uniquely identify objects, database rows, sessions, and more — without needing a central authority to assign them.
What's the difference between UUID v4 and v1?
v4 is randomly generated — the most common and safest choice. v1 is time-based and includes a timestamp, which makes UUIDs sortable but reveals when they were created.
Can two generated UUIDs ever be the same?
Theoretically yes, but the probability is astronomically small — roughly 1 in 5.3 undecillion for v4. In practice, duplicates are considered impossible.
Are these UUIDs safe to use in production?
Yes. v4 UUIDs use crypto.getRandomValues() — the same cryptographically secure source used by professional tools.
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