Online UUID Generator • { Version 7 } •

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier that is globally unique across time and space. Our free online UUID generator creates Version 7 UUIDs, which are time-ordered and have extremely low collision probability. Unlike other UUID versions, UUID v7 provides chronological sortability while maintaining global uniqueness.

When to Use UUID Version 7

UUID v7 is ideal for these use cases:

• Database primary keys where chronological ordering is important
• Distributed systems requiring sortable unique identifiers
• Sequential logs and data structures
• Time-series data identification
• Microservices architecture with temporal dependencies
• Event sourcing systems requiring natural time ordering

About Version 7 UUIDs

Version 7 UUIDs are generated using Unix timestamps in milliseconds plus random data. They follow the format:01890a5d-583e-7de7-a5cd-b32a3977c2f1Where the first 48 bits contain a Unix timestamp (in milliseconds) and the remaining bits contain random or sequenced data. This design provides both uniqueness and chronological ordering.

UUID v7 Generator Features

Our time-ordered UUID generator tool provides:

• RFC-compliant Version 7 UUIDs with millisecond precision timestamps
• Chronologically sortable identifiers
• Bulk generation of up to 1000 UUIDs at once
• CSV and TXT download options for generated UUIDs
• One-click copying to clipboard
• Visible timestamp information for each generated UUID
• 100% free with no registration required

Frequently Asked Questions

What's the advantage of UUID v7 over other versions?

UUID v7 combines the best of both worlds: it maintains the global uniqueness of UUIDs while adding chronological sortability. This makes it ideal for database primary keys and distributed systems where time ordering is important. Traditional UUID v4 lacks natural sort order, while UUID v1 has privacy concerns due to including MAC addresses.

Are UUID v7 identifiers secure?

Yes, UUID v7 uses cryptographically secure random data for a portion of the identifier while incorporating timestamps. The timestamp portion is visible but doesn't compromise security for most applications. For highly sensitive contexts, UUIDs should be treated as visible identifiers rather than security mechanisms.

Can I use UUID v7 in my database right now?

Yes, many modern databases and programming languages have added support for UUID v7. The standard is being finalized but is already implemented in various libraries. UUID v7 offers performance advantages for indexed columns due to its time-ordered nature, minimizing index fragmentation compared to random UUIDs.

How precise is the timestamp in UUID v7?

UUID v7 timestamps provide millisecond precision, which is sufficient for most application needs. The first 48 bits of the UUID are dedicated to the timestamp component, representing milliseconds since the Unix epoch (January 1, 1970).