UUID Generator

What Is a UUID Generator?

A UUID generator creates universally unique identifiers — 128-bit values guaranteed to be unique across all devices and time. Our free online UUID generator supports UUID v4 (random), UUID v1 (timestamp), and the newer UUID v7 (sortable). Generate single or bulk UUIDs instantly in your browser with complete privacy.

How to Use This UUID Generator

Select your preferred UUID version from the dropdown — v4 for random, v1 for timestamp-based, or v7 for sortable. Set the quantity (1 to 1,000) and click "Generate". UUIDs appear instantly with individual copy buttons. Use format toggles for uppercase, no hyphens, or GUID braces. Click "Copy All" to copy the entire list, or download as TXT, CSV, or JSON.

Key Features

• UUID v4, v1, and v7 generation — all major versions supported
• Bulk generation up to 1,000 — generate multiple UUIDs at once
• Format options — uppercase, hyphens, GUID braces
• UUID validator and decoder — validate any UUID and decode its components
• Nil and Max UUID — quick buttons for special UUID values
• Download as TXT, CSV, JSON — export bulk UUIDs in your preferred format
• Copy individual or all — one-click copy for any UUID or the entire list
• History panel — last 20 generated UUIDs saved in session

Why Choose Our UUID Generator?

Unlike other GUID generators online, our tool supports all three major UUID versions including the newer v7, offers bulk generation up to 1,000 UUIDs, and includes a built-in validator that decodes UUID components and timestamps. Everything runs client-side using the Web Crypto API. No data is sent to any server.

Common Use Cases

• Database developers — generating primary keys for distributed databases
• .NET developers — generating GUIDs with brace format for C# applications
• API developers — creating unique request IDs, correlation IDs, and trace IDs
• DevOps engineers — generating unique deployment identifiers
• Students — understanding UUID structure and versions for coursework

Tips and Best Practices

Use UUID v4 for most applications — it is the most widely supported and has no information leakage. Use UUID v7 when you need sortable IDs for database primary keys, as the timestamp prefix ensures chronological ordering which improves database index performance. Avoid UUID v1 in security-sensitive contexts as it can reveal timing information. When storing UUIDs in databases, use the native UUID/GUID column type rather than VARCHAR for better performance and storage efficiency.