UUID / GUID Generator
Generate random UUIDs (v4) instantly. Create one or bulk UUIDs online. Free, no signup.
Frequently asked questions
- What version of UUID does it generate?
- It generates version 4 UUIDs, which are random. The version and variant bits are set according to RFC 4122, so the output is a standard, compliant UUID.
- How many UUIDs can I generate at once?
- Between 1 and 100 per run, which is handy for seeding test databases or mock data.
- What format options are there?
- Standard lowercase with dashes, the same in uppercase, or a compact form without dashes, depending on what your database or API expects.
- Are the UUIDs guaranteed to be unique?
- They contain 122 random bits, so the chance of a collision is astronomically small. For practical purposes you can treat every generated UUID as unique.
This tool runs entirely in your browser. No data is uploaded anywhere.