UUID / GUID Generator – Generate UUID v4 Online

About this tool

UUID v4 uses 122 bits of randomness, making collisions statistically impossible at any normal scale. This is the standard identifier format for distributed systems, REST APIs, and databases where sequential integer IDs create security or coordination issues.

Generate one or multiple UUID v4 identifiers instantly - the random 128-bit IDs used in databases, APIs, session tokens, and file systems where uniqueness across distributed systems matters.

How to use UUID Generator

1. Step 1: Set Count. Choose how many UUIDs you need - from 1 up to 100.
2. Step 2: Generate. Click Generate to create cryptographically random UUID v4 IDs.
3. Step 3: Copy One or All. Copy individual UUIDs or click Copy All to grab the full list.
4. Step 4: Regenerate. Click Generate again to create a fresh batch any time.

Where this tool helps

Generate UUIDs for database primary keys during development, create request IDs for API testing and debugging, generate session tokens for authentication flows, create file names for uploaded content, test UUID-dependent validation logic, and produce bulk identifiers for data seeding scripts.

• Generates version 4 (random) UUIDs - the most widely used UUID type for database primary keys and API request IDs.
• Works in bulk - generate multiple UUIDs at once and copy individually or all together.
• Runs entirely in your browser; no server involved, no data sent anywhere.

The most common question is about GUID vs UUID - they are the same thing. UUID is the RFC 4122 standard name; GUID (Globally Unique Identifier) is Microsoft's terminology for the same format.