UUID Generator

Generate unique UUIDs (v4) instantly. Create random universally unique identifiers for your projects.

Count

Uppercase

421a17ca-7cc1-4c7f-85cd-329093e9880d

How to Use UUID Generator

Set the quantity

Choose how many UUIDs to generate — from 1 to hundreds at a time for bulk operations.

Click Generate

The tool instantly creates cryptographically secure UUID v4 identifiers using the Web Crypto API.

Copy and use

Click to copy individual UUIDs or all at once. Paste them directly into your database, code, configuration files, or API requests.

About UUID Generator

Generate UUIDs online for free with our UUID Generator tool. Create universally unique identifiers (UUID v4) instantly using cryptographically secure random number generation. Perfect for generating primary keys for databases, unique identifiers for APIs and microservices, session tokens, correlation IDs for distributed systems, and test data. Bulk generate multiple UUIDs at once and copy them all with one click. RFC 4122 compliant format ensures compatibility with PostgreSQL, MongoDB, MySQL, and all major platforms. Runs entirely in your browser.

Key Features

Generate UUID v4 (random) identifiers with cryptographic security
Bulk generate hundreds of UUIDs at once for batch operations
Copy individual or all UUIDs to clipboard with one click
Uses Web Crypto API for truly random, collision-resistant identifiers
Standard RFC 4122 compliant UUID format for universal compatibility
Free online tool — no signup, no limits, works entirely in your browser

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Frequently Asked Questions

How to generate a UUID online for free?▾

Click Generate on our UUID Generator to instantly create one or more UUID v4 identifiers. Copy them with one click. No signup or payment required.

What is a UUID?▾

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. The standard format is xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, where 4 indicates version 4 (random).

What is UUID v4?▾

UUID v4 uses random or pseudo-random numbers to generate identifiers. It provides 122 bits of randomness, making collisions virtually impossible with a probability of about 1 in 5.3 x 10^36.

Can two UUIDs ever be the same?▾

While theoretically possible, the probability is astronomically low. You would need to generate 1 billion UUIDs per second for about 85 years to have a 50% chance of a single collision.

How to generate a GUID for a database?▾

UUID and GUID are the same thing (GUID is Microsoft terminology). Generate a UUID here and use it as a primary key or unique identifier in PostgreSQL, MySQL, MongoDB, SQL Server, or any database.

Are the generated UUIDs truly random?▾

Yes. We use the Web Crypto API (crypto.getRandomValues) which provides cryptographically secure random numbers, ensuring each UUID is unpredictable and unique.

How to bulk generate multiple UUIDs?▾

Set the quantity to the number you need and click Generate. The tool creates all UUIDs at once. Use "Copy All" to grab them all for pasting into your application.

Is this UUID generator safe to use?▾

Yes. All UUID generation happens in your browser using JavaScript. No data is sent to any server. The UUIDs are generated locally and are never stored or tracked.