Want the full story? See the UUID v7 guide for a detailed breakdown, comparison with other versions, and code examples in 9 languages.
Understanding UUID Version 7 Generation
UUID Version 7, a modern addition to the UUID specification, is designed by our UUID generator to offer time-based ordering with improved precision. When you generate a UUID of this version, it avoids the potential privacy concerns of MAC addresses found in Version 1. It incorporates a Unix timestamp with millisecond precision.
Unix Timestamp (Milliseconds)
The first 48 bits of a Version 7 UUID generated by our tool represent the Unix timestamp in milliseconds since the epoch (1970-01-01 00:00:00 UTC). This is a key component when you generate this type of UUID.
Randomness
The UUID generator fills the remaining 80 bits with cryptographically secure pseudo-random data. This ensures the generated UUID is unique even when multiple UUIDs are created within the same millisecond.
Version and Variant Bits
When our UUID generator creates a Version 7 UUID, the version bits are set to '0111' (hexadecimal '7'), and the variant bits are set to '10' (as per RFC 4122), ensuring the generated UUID is standard-compliant.
The format for a UUID Version 7 generated by our tool is
xxxxxxxx-xxxx-7xxx-xxxx-xxxxxxxxxxxx. The '7' in the
third group of hexadecimal digits clearly indicates that you've
generated a Version 7 UUID.
Benefits
Generating a UUID Version 7 provides chronological ordering, which is beneficial for database indexing and logging. The inclusion of random bits by the UUID generator ensures high uniqueness for the generated UUID without relying on potentially identifying hardware addresses, offering better privacy.
Bulk UUIDv7 Generation
Our bulk UUID generator can also create large batches of UUID Version 7 values in one step. This is useful when you need many sortable, privacy-focused identifiers for imports, test data, message queues, or application setup.
Why use the bulk UUIDv7 tool?
UUIDv7 combines a millisecond Unix timestamp with strong randomness, so bulk generation gives you identifiers that are both time-ordered and highly unique. That makes the output practical for workflows where insertion order, traceability, and privacy all matter.
- Database seeding: Generate many UUIDv7 values in advance for tables that benefit from chronological ordering and better index locality.
- Testing and fixtures: Create ready-to-use UUID batches for QA, automated tests, and staging data.
- Batch operations: Prepare a large list of unique identifiers for APIs, events, logs, or background jobs without generating them one by one.
Copy all or download
After generating a batch, you can copy the full list or download it as a plain text file. Each UUID appears on its own line, making the bulk UUIDv7 tool convenient for scripts, spreadsheets, imports, and operational workflows.