developer

UUID Generator

UUID Generator

Generate random UUIDs (v4) instantly. Copy multiple UUIDs at once.

Generated UUIDs

Configure inputs and run the tool

Results will appear here

About this UUID Generator

The UUID Generator is a free online tool for creating random UUIDs (Universally Unique Identifiers) version 4. UUIDs are 128-bit identifiers used extensively in software development for database primary keys, session tokens, API resource identifiers, and distributed system identifiers. This UUID v4 generator produces cryptographically random identifiers instantly, supporting batch generation of up to 100 UUIDs at once for maximum productivity.

How to use the UUID Generator

  1. 1 Enter the number of UUIDs you need in the "Number of UUIDs" field (between 1 and 100).
  2. 2 Leave the default value of 1 if you only need a single UUID.
  3. 3 Click the Run button to generate your UUIDs instantly.
  4. 4 Copy the generated UUIDs from the output area, each on its own line.

Frequently Asked Questions

What is a UUID v4?
A UUID v4 is a universally unique identifier generated using random numbers. It follows the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where each x is a random hexadecimal digit and y indicates the UUID version. The probability of collision is extremely low, making it safe for use as unique identifiers.
Are the generated UUIDs truly random?
Yes, this tool uses JavaScript's crypto.getRandomValues() under the hood through the browser's native random generation, which provides cryptographically strong random numbers. The UUIDs follow RFC 4122 standard for version 4 UUIDs.
What are UUIDs commonly used for?
UUIDs are used as primary keys in databases, unique identifiers for API resources, session identifiers, order numbers, file names, and any scenario where a unique identifier needs to be generated without a central coordinating authority.
Can I generate more than one UUID at a time?
Yes, you can set the count from 1 to 100. This is useful when you need multiple unique identifiers for batch operations like seeding a database, generating test data, or creating multiple API resources.

Related Tools

developer

JSON Formatter

Format, validate, minify, and beautify JSON data instantly in your browser.

developer

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to plain text.

developer

URL Encoder / Decoder

Encode or decode URL strings safely for web usage.

developer

JWT Decoder

Decode JWT tokens to inspect header and payload claims.