Developer & data
UUID generator
Generate UUID v4 identifiers using browser cryptographic randomness.
Runs in your browser · No file or text uploads
Preparing your tool…
What UUID generator helps you do
Create random identifiers for test data, temporary records or prototypes without an account.
How to use it
- Choose how many identifiers you need, from 1 to 100.
- Select Generate UUIDs.
- Copy the values, one per line.
Input and output example
INPUT
Count: 2OUTPUT
Example: 9e52fd58-8d07-4b2c-a458-49f527ac46fd (new random values each run)
Supported formats and limits
- Maximum batch: 100 UUIDs.
- Requires Web Crypto on HTTPS or localhost in a supported browser.
How the result is calculated
Uses crypto.randomUUID() to generate the 36-character lowercase UUID v4 format, including its version and variant bits.
Frequently asked questions
Are generated identifiers stored?
No. They remain in the page’s memory until you leave or reset it, unless you copy or download them.
Is a duplicate impossible?
The collision probability is very small, but not zero. Important systems should also enforce uniqueness in their database.