ToolKit

UUID Generator Online Free

UUID Generator creates version 4 universally unique identifiers on demand. Generate a single UUID for a database row, API key or test fixture, or produce thousands at once for bulk data seeding. Each UUID is created locally using your browser's cryptographic random source, so the values are unpredictable and never transmitted anywhere. Copy one ID or download the whole batch. A reliable tool for developers, DBAs and QA engineers who need unique identifiers fast.

How to use UUID Generator

  1. 1

    Choose how many UUIDs

    Enter the number of UUIDs you need, from 1 up to several thousand.

  2. 2

    Generate

    Click Generate to create the UUIDs using your browser's secure random source.

  3. 3

    Copy or download

    Copy a single UUID or download the full list as a text file.

Why use this tool

  • Generate cryptographically-random UUID v4 values
  • Create a single ID or thousands at once
  • Hyphen-free option for compact output
  • Private — UUIDs are generated locally
  • Free, instant, no sign-up

Frequently asked questions

What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit value such as 550e8400-e29b-41d4-a716-446655440000, used to uniquely identify records without a central authority.
Which UUID version does this generate?
Version 4, which uses random bits from your browser's cryptographically-secure random source. This is the most common version in modern applications.
Are generated UUIDs truly unique?
The chance of two random v4 UUIDs colliding is astronomically small — far less than winning most lotteries. For all practical purposes they are unique.
Can I generate many UUIDs at once?
Yes. Enter the quantity you need and generate them in one batch, then copy or download the list.
Are the UUIDs sent anywhere?
No. They are generated locally in your browser and never transmitted.
Can I get UUIDs without hyphens?
Yes. Toggle the hyphen option to produce compact 32-character hex strings.

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