UUID Generator — Generate UUID v4 Online
Generate cryptographically random UUID v4 identifiers instantly. Generate one at a time or bulk-generate up to 100 UUIDs for testing and development.
Most current tools process data directly in your browser. If a tool requires external processing, it will say so clearly.
How to Generate UUIDs
- 1Click 'Generate UUID' for a single UUID
- 2Set the count (up to 100) and click 'Generate Bulk' for multiple UUIDs
- 3Toggle uppercase or no-dashes format as needed
- 4Click any UUID to copy it, or use 'Copy All' for bulk
Key Benefits
- Cryptographically secure random generation
- Bulk generate up to 100 UUIDs at once
- Format options: uppercase, no-dashes
- Click any result to copy it instantly
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify information in computer systems. UUID v4 is randomly generated and has a probability of collision that is effectively zero.
Are these UUIDs truly random?
Yes. This tool uses the Web Crypto API (crypto.randomUUID) which provides cryptographically secure random numbers, ensuring high-quality uniqueness.
What is the format of a UUID v4?
A UUID v4 follows the format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where x is a random hex digit and y is 8, 9, a, or b.