Kotlin UUIDv7 Generator

A zero dependency, dead simple version 7 UUID generator in 40 lines or less.

Features

• Zero Dependencies: The entire implementation is under 40 lines and requires no external dependencies.
• Timestamp-based UUIDs: Embeds the current timestamp in milliseconds into the UUID for ordering.
• Randomness and Uniqueness: Uses SecureRandom to generate high-entropy random bits.
• Standards Compliance: Sets the correct version and variant bits according to the UUIDv7 draft specification.
• Easy Integration: Provides a singleton object UUIDv7 with a simple randomUUID() method.

Usage

Just copy the UUIDv7.kt file to your project.

import UUIDv7

fun main() {
    val uuid = UUIDv7.randomUUID()
    println(uuid) // 01923d43-13b4-7f90-b304-cf0ca680b6c5
}