UUID Generator

Free Online UUID Generator – Create Unique Identifiers Instantly

Generate RFC 4122 compliant UUID v4 (and other formats) with bulk generation, validation, and one-click copy.

Hey there! UUIDs (Universally Unique Identifiers) are essential for creating unique IDs in databases, APIs, file names, and distributed systems. Our free UUID Generator lets you create secure, random UUIDs instantly — including support for bulk generation and validation of existing UUIDs.

Everything runs in your browser — 100% private and no data is sent anywhere.

What Is a UUID?

A UUID is a 128-bit number represented as 32 hexadecimal characters, usually displayed in this format:

xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx

Example: 3f6d9c2a-1b4e-4f7a-9e2d-7bc8e5f1a3d0

How to Use the UUID Generator

1. Click “Generate UUID” to create a single random UUID v4.
2. Choose your preferred format: lowercase, UPPERCASE, no hyphens, or with braces.
3. Use the bulk generator to create 10, 50, or up to 200 UUIDs at once.
4. Paste UUIDs into the validator to check if they are valid.
5. Click any UUID to copy it instantly.

Key Features

• Generates cryptographically secure UUID v4
• Multiple output formats (lowercase, UPPERCASE, no hyphens, with braces)
• Bulk generation (up to 200 UUIDs at once)
• Built-in UUID validator with clear feedback
• One-click copy for single or all UUIDs
• Download generated list as a text file
• Live colored breakdown of UUID parts
• 100% browser-based and completely private

Common Use Cases for UUIDs

• Database primary keys (better than auto-increment IDs)
• Session IDs and authentication tokens
• File naming to prevent collisions
• API request IDs for tracing
• Generating test data for development

Pro Tips

• Use UUID v4 for most general purposes — it’s truly random and collision-resistant
• Enable “No Hyphens” format when using UUIDs in URLs or file names
• Use bulk generation when you need many test IDs quickly
• Always validate UUIDs received from external sources before using them

Why Developers Love This UUID Generator

• Forever free with no limits or ads
• Cryptographically secure generation
• Multiple formats and bulk support
• Built-in validation tool
• Works smoothly on desktop and mobile
• 100% private — UUIDs are generated locally in your browser

Ready to Generate UUIDs?

Stop manually creating or copying UUIDs. Generate secure, unique identifiers instantly.

→ Generate UUIDs Now – Free & Instant