A free UUID generator that creates RFC 4122 version 4 UUIDs (random) entirely in your browser. Generate one or many UUIDs, with or without hyphens, and copy a single value or the whole list. No server required—ideal for developers, test data, and distributed systems.

Why Use This UUID Generator?

• Instant: Generate 1 to 100 UUIDs in one click.
• Private: All generation happens locally; nothing is sent to any server.
• Flexible: Toggle hyphens on or off for compatibility with different systems.
• Convenient: Copy one UUID or copy all UUIDs as a newline-separated list.

Key Features

• Bulk generation: Choose how many UUIDs to generate (1–100).
• Format option: Include or remove hyphens (e.g. 550e8400-e29b-41d4-a716-446655440000 vs 550e8400e29b41d4a716446655440000).
• Copy single or all: Copy one UUID from the list or copy the entire list at once.
• RFC 4122 v4: Uses crypto.randomUUID() when available, with a secure fallback for older browsers.

How it Works

The tool uses the Web Crypto API when available: crypto.randomUUID() returns a standard UUID v4. In older environments, it falls back to crypto.getRandomValues() to fill 16 bytes and sets the version (4) and variant bits according to RFC 4122, then formats the result as 8-4-4-4-12 hex with optional hyphens.

Try the UUID Generator

Use the options above to set the count and hyphen format, click Generate, then copy a single UUID or the full list. The tool runs entirely in your browser—no data is uploaded.