UUID Generator
Generate UUIDs (v4) online. Free bulk UUID generator with options for uppercase, no dashes, and custom count.
Output will appear here...
What is UUID Generator?
A UUID (Universally Unique Identifier) is a 128-bit identifier that is guaranteed to be unique across space and time. Version 4 UUIDs are randomly generated and look like: 550e8400-e29b-41d4-a716-446655440000. UUIDs are used as database primary keys, session tokens, file names, and anywhere you need a unique identifier without coordination.
How to Use
- Set the number of UUIDs to generate (1-100)
- Choose formatting options: uppercase, no dashes, or braces
- Click Generate to create UUIDs instantly
- Click Copy to copy all generated UUIDs to your clipboard
Examples
Standard UUID v4
Uppercase, no dashes
Related Tools
Hash Generator (MD5, SHA)
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes online. Free hash generator with instant computation.
Bcrypt Hash Generator
Generate and verify bcrypt hashes online. Free bcrypt password hash generator with configurable cost rounds.
JWT Decoder
Decode and inspect JWT tokens instantly. Free online JWT decoder with header, payload, and expiration analysis.
Base64 Encode & Decode
Encode text to Base64 or decode Base64 to text. Free online Base64 encoder and decoder with instant conversion.
Frequently Asked Questions
Are generated UUIDs truly unique?
UUID v4 uses random bytes (122 bits of randomness). The probability of generating a duplicate is approximately 1 in 2.71 quintillion. For practical purposes, they are guaranteed unique.
What's the difference between UUID and GUID?
GUID (Globally Unique Identifier) is Microsoft's implementation of UUID. They follow the same standard (RFC 4122) and are functionally identical.
Can I use these UUIDs in production?
Yes. This tool uses crypto.getRandomValues() — the same cryptographically secure random number generator used by servers. The UUIDs are generated entirely in your browser.