Choosing a UUID type
UUID v4 is the normal choice when you need a random identifier. The NIL UUID is a standardized all-zero value. Use time-based output only when its creation-time characteristics match your requirements.
UUID Generator
Generate individual or bulk UUID values directly in your browser. Choose a random v4 value, a time-based value, or the all-zero NIL UUID, then control letter case and hyphen formatting.
Features
UUID v4 generationBulk generationUppercase/lowercase optionsWith or without hyphensCopy to clipboard
How to use the UUID Generator
- 1Choose the UUID type, letter case, and whether to include hyphens.
- 2Select Generate New for one value.
- 3For a list, enter a bulk quantity from 1 to 1,000 and generate the set.
- 4Copy a value, copy the full list, or download bulk results as a text file.
Common uses
- Create identifiers for database records, fixtures, and API examples.
- Generate a bulk list for import or load-testing data.
- Use a NIL UUID as an explicit empty or placeholder identifier.
Formatting options
Standard UUID text uses lowercase hexadecimal characters separated by hyphens. Some systems accept uppercase or compact values without hyphens, which can be selected before generation.
Frequently asked questions
Which UUID type should I normally use?
UUID v4 is the usual choice for general application identifiers because it is random and widely supported.
How many UUIDs can I create at once?
The bulk generator accepts between 1 and 1,000 values.
What is a NIL UUID?
It is the special all-zero value 00000000-0000-0000-0000-000000000000, often used as a placeholder.