UUID Generator – Generate Random UUIDs v4 Free Online
Generate random UUIDs (v4) instantly. Bulk generate and copy with one click. Free UUID generator - no sign-up required.
0822d683-f014-4bbb-a37e-f1f9e4848e65Frequently Asked Questions
A UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify information in computer systems. The standard format is 32 hexadecimal digits displayed in five groups separated by hyphens: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
This tool generates UUID version 4 (v4), which is randomly generated. It uses the browser's built-in crypto.randomUUID() API for cryptographically secure random values.
UUID v4 has 122 bits of randomness, giving approximately 5.3 × 10^36 possible values. The probability of generating two identical UUIDs is astronomically small — effectively zero for any practical use case.
Yes. Use the slider to set how many UUIDs to generate (up to 50), then click Generate. You can copy all of them to the clipboard at once with the 'Copy All' button.
No. UUIDs are generated entirely in your browser using the Web Crypto API and are never sent to any server.
What is UUID Generator?
A UUID (Universally Unique Identifier) is a 128-bit identifier that is guaranteed to be unique across all space and time. UUID v4 uses random numbers to generate identifiers. UUIDs are widely used in databases, APIs, and distributed systems to uniquely identify records without a central authority. Our UUID Generator uses the browser's Web Crypto API to generate cryptographically random UUIDs.
How to Use UUID Generator
- 1Click Generate to create a new UUID.
- 2Use the Bulk Generate option to create multiple UUIDs at once.
- 3Click Copy to copy a UUID to your clipboard.
Key Features
- ✓UUID v4 generation using Web Crypto API
- ✓Bulk generation (up to 100 at once)
- ✓One-click copy
- ✓Instant generation
- ✓No sign-up required
Benefits
- →Generate unique IDs for database records
- →Create unique identifiers for API resources
- →Test applications with realistic UUID data
Why Use Irreva for UUID Generator?
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information. UUID v4 is randomly generated and has an astronomically low probability of collision.
What is the difference between UUID and GUID?
GUID (Globally Unique Identifier) is Microsoft's implementation of the UUID standard. They are functionally identical.
Are the generated UUIDs truly unique?
UUID v4 uses 122 bits of randomness, giving approximately 5.3 x 10^36 possible values. The probability of generating two identical UUIDs is negligibly small.
Is this cryptographically secure?
Yes. The tool uses the browser's Web Crypto API (crypto.getRandomValues()) for cryptographically secure random number generation.
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