# UUID v7 Generator

> Generate time-sortable UUID version 7 identifiers — ideal as database primary keys.

To generate UUID v7 identifiers, set a count above. Version 7 embeds a millisecond Unix timestamp in the leading bits, so IDs sort chronologically. That makes them far better than v4 as database primary keys because inserts stay sequential and indexes do not fragment.

**URL:** https://convertto.tech/t/uuid-v7-generator
**Category:** Hash & Crypto Tools (https://convertto.tech/c/crypto-tools)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Set the how many.
2. Turn "Uppercase" on or off as needed.
3. The result appears immediately — copy or download it.

## FAQ

### Why prefer UUID v7 over v4 for database keys?

Random v4 values scatter inserts across a B-tree index, causing page splits and cache misses. v7 values increase over time, so new rows append to the end of the index like an auto-increment key would.

## Sources

- [RFC 9562 §5.7 - UUID Version 7](https://www.rfc-editor.org/rfc/rfc9562#section-5.7) — IETF

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