UUID / GUID Generator (v1, v4, v7)
Generate UUIDs in v1, v4, and v7 formats instantly. Bulk generate, copy, and export. 100% client-side, no server calls.
About this tool
UUIDs (Universally Unique Identifiers) are 128-bit identifiers used to uniquely label objects in software systems. This generator supports three UUID versions:
UUID v1 — time-based, encodes the current timestamp and MAC address (simulated in browser). Good for time-ordered records.
UUID v4 — random, generated from cryptographically secure random bytes. The most commonly used version. Perfect for database primary keys, session IDs, and most general-purpose use.
UUID v7 — new standard (RFC 9562), monotonically increasing, sortable by creation time. Ideal for database primary keys where natural sort order matters.
Use the bulk generator to create up to 100 UUIDs at once and export them as plain text or JSON.
Frequently Asked Questions
What's the difference between UUID v4 and v7?
Are generated UUIDs truly unique?
What is a GUID?
Can I use UUID v1 in a browser?
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