UUID Generator
Generate cryptographically random UUID v4 (RFC 4122) and time-ordered UUID v7 identifiers in bulk. Choose from standard, no-dashes, braces, or URN output formats. Generate 1 to 100 UUIDs at once with one-click copy-all.
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Common Use Cases
- Generate primary keys for database records
- Create correlation IDs for distributed tracing
- Seed test data with unique identifiers
- Generate v7 UUIDs for time-sortable IDs
Frequently Asked Questions
What is the difference between UUID v4 and UUID v7?
UUID v4 is fully random. UUID v7 embeds a Unix millisecond timestamp in the first 48 bits, making it lexicographically sortable by creation time — ideal for database primary keys where index performance matters.
Are these UUIDs safe to use as database primary keys?
Yes. UUID v4 is universally unique with 122 bits of randomness. UUID v7 is preferable for primary keys because it is time-ordered, which reduces B-tree index fragmentation in databases like PostgreSQL and MySQL.
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Tool Info
CategorysecurityAI EnhancementNoData StorageZero retention