Introducing UUID Generator | Tools.Town Blog

UUID Generator is now live on Tools.Town — a developer tool that generates cryptographically random v4 UUIDs using the browser’s native crypto.randomUUID() API, in any quantity from 1 to 1000, with one-click copy.

Generate test IDs, seed data, database keys, or API tokens — instantly, without writing a line of code.

What Does It Do?

Bulk Generation

Generate 1 to 1000 UUIDs in one click — faster than any script for seeding test data.

Cryptographic

Uses crypto.randomUUID() — the browser's native CSPRNG — for genuine cryptographic randomness.

Copy Options

Copy a single UUID, copy all as a list, or copy as a JSON array — whichever your use case needs.

UUIDs are generated using crypto.randomUUID() — the W3C standard browser API for cryptographically secure random identifiers.

How It Works

Set quantity

Enter how many UUIDs to generate (1–1000) and choose v4 (random) or v1 (time-based).

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Generate

Click Generate. All UUIDs appear instantly in a scrollable list.

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Copy

Click Copy All to grab every UUID, or click any individual UUID to copy just that one.

Why We Built It

Developers need UUIDs constantly — for seeding test databases, mocking API responses, creating unique file names, and generating test user IDs. UUID Generator makes bulk creation a two-click operation, with the cryptographic quality that production-grade identifiers require.

Try It Now

Free Tool

No sign-up In-browser

UUID Generator

Generate cryptographically random v4 UUIDs in bulk — 1 to 1000 at a time. Copy individually or all at once.

Bulk generation (1–1000)Cryptographic v4Copy all as JSONv1 time-based option

Generate UUIDs

Also in developer tools: JWT Generator, Binary Converter, and more.

Frequently Asked Questions

What is a UUID?

A Universally Unique Identifier — a 128-bit value formatted as 32 hex digits in 5 groups (e.g. 550e8400-e29b-41d4-a716-446655440000). Used as unique keys in databases, APIs, and distributed systems.

What's the difference between UUID v1 and v4?

v1 is time-based and includes the machine's MAC address — sortable but potentially privacy-sensitive. v4 is completely random — the most widely used format for security and uniqueness.

How unique are v4 UUIDs?

The probability of generating two identical v4 UUIDs is astronomically small — approximately 1 in 5.3 × 10^36. For all practical purposes, they are unique.

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Introducing UUID Generator — Now Live on Tools.Town