KSUID stands for K-Sortable Unique ID. It is a 27-character base62 identifier that includes a timestamp component, making it roughly sortable by creation time.

How do I generate KSUIDs in JavaScript?

Use the Generate button. The tool uses the browser's crypto API to generate KSUIDs that are time-sortable and unique.

Can I generate many KSUIDs at once?

Yes. Pick a count (1–1000) and click Generate to get a list of KSUIDs instantly.

Yes. All generation happens locally in your browser and nothing is sent to a server.

Free · Client-side · KSUID

KSUID Generator

Generate K-Sortable Unique Identifiers (KSUIDs) instantly using JavaScript. Perfect for time-sorted IDs in logs and distributed systems.

KSUID Generator

All KSUIDs are generated locally using cryptographically secure randomness; nothing is sent to a server.

How many KSUIDs?

Select a number and click Generate to create KSUIDs.

What is a KSUID?

KSUIDs (K-Sortable Unique IDs) are 27-character base62 identifiers that include a timestamp prefix, making them sortable by creation time.

1kxj7z9w3u7a41e0qz0j0e5d10 → 1kxj7z9w3u7a41e0qz0j0e5d10

Time-sortable

KSUIDs embed a timestamp so that IDs generated later sort after earlier IDs.

Compact & safe

KSUIDs are 27 characters using base62, making them safe for URLs and easy to store.

Client-side only

Generation happens locally in the browser; nothing is sent to a server.

Overview

What is a KSUID?

A KSUID (K-Sortable Unique Identifier) is a 27-character base62 string that begins with a 4-byte timestamp and includes 16 bytes of randomness.

KSUIDs are designed to be sortable by creation time while remaining compact and collision-resistant.

27 chars, base62 (0-9A-Za-z)
Includes 4-byte timestamp (seconds since 2014)
Includes 16 bytes random payload
Sorts in creation order when treated as a string

KSUID Structure

1kxj7z9w3u7a41e0qz0j0e5d10

1kxj7z9w timestamp
4 bytes

3u7a41e0qz0j0e5d10 payload
16 bytes

This tool generates the full 27-char KSUID using secure randomness and current time.

Versions

Other UUID Tools

KSUIDs are a complement to UUIDs; the WebEasier suite supports both.

Tool	Use Case	Format	Typical Size
UUID v4	General unique IDs	8-4-4-4-12 hex	36 chars
KSUID	Time-sortable IDs	27-char base62	27 chars

Live Examples

Example KSUIDs

Click an example to generate a KSUID quickly.

FAQ

Frequently Asked Questions

Answers to common questions about KSUID generation.

A KSUID is a K-Sortable Unique Identifier that includes a timestamp prefix so IDs sort by creation time.

Generate up to 1000 KSUIDs at a time. Enter a number and click Generate.

Yes. This tool uses crypto-safe randomness from the browser's crypto API.

Yes. Everything runs locally in your browser and nothing is sent to a server.

Ecosystem

Complete UUID Tools Directory

WebEasier hosts a full ecosystem of UUID-related developer tools.

UUID Generation

UUID Validation

UUID Parsing

UUID Formatting

UUID Conversion

Developer UUID Generators

JavaScript UUID Generator

Alternative ID Generators

🔑

25+ UUID & ID Tools

WebEasier is building the most complete UUID tools ecosystem on the web.

View All Tools

KSUID Generator

KSUID Generator

What is a KSUID?

KSUID Structure

Other UUID Tools

Example KSUIDs

Frequently Asked Questions

What is a KSUID?

How many KSUIDs can I generate at once?

Are KSUIDs secure?

Is this tool private?

Complete UUID Tools Directory

UUID Generation

UUID Validation

UUID Parsing

UUID Formatting

UUID Conversion

Developer UUID Generators

Alternative ID Generators

25+ UUID & ID Tools