Random GUID Generator
Generate cryptographically random UUID version 4 identifiers, one or a thousand at a time, in the format you need.
- Runs in your browser
- Free to use
About this tool
The Random GUID Generator uses crypto.randomUUID() to produce standard UUID v4 values in bulk, formatted as plain lowercase, uppercase, braced or hyphen-less strings for SQL scripts, config files, API tests and documentation. Find existing identifiers in text with the UUID extractor.
How to use it — quick steps
- 01
Enter the how many
Type or paste the how many in the field above. Nothing is uploaded: the text stays in your browser.
- 02
Adjust the options
Pick the settings that fit your case; the defaults work for most people. They apply on the next run.
- 03
Press "Generate UUIDs"
Press "Generate UUIDs" or Ctrl + Enter. The result appears below in an instant. Results can be copied.
Key features of this tool
Cryptographically random
Values come from the browser's secure random generator, never from a predictable seed.
Generated locally
Nothing is sent to our servers; refresh for a new batch of randomly generated data whenever you need more.
Bulk ready
Generate up to a thousand values at once, easily copy or download them all in a click.
Frequently asked questions
What is a UUID v4?
A 128-bit identifier with 122 random bits (RFC 4122). The chance of two ever colliding is negligible, which is why they are used as database keys, request IDs and tokens.
GUID or UUID?
Same thing: GUID is Microsoft's name, often written in braces and uppercase, which the options reproduce.
Are these values truly random?
They are produced with the browser's cryptographic random generator (crypto.getRandomValues), so they are unpredictable and suitable for test data, salts and tokens.
Are my files or data uploaded?
No. The tool is plain JavaScript that runs in your browser; the files or data you provide here are never uploaded to our servers.