A free online UUID v4 generator. Create universally unique identifiers using crypto.randomUUID(). Generate single or batch UUIDs (up to 50 at once), toggle hyphens and case, and copy any result. All generation happens locally in your browser.
Choose how many UUIDs to generate (1, 5, 10, or 50).
Toggle hyphens on/off and case (lower/upper).
Click Generate for a fresh batch.
Click copy next to any UUID to copy it.
A UUID (Universally Unique Identifier) is a 128-bit identifier represented as a 36-character string (32 hex digits + 4 hyphens). Version 4 UUIDs use random numbers, making collisions extremely unlikely.
Yes. The tool uses the browser's built-in crypto.randomUUID() API, which provides cryptographically secure random UUIDs suitable for production use as database keys and identifiers.
Free online tool — works in your browser, no sign-up required. Start using it right now.
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