Create UUID v4 / GUID values locally. Format, bulk-generate and validate.
GUID (Microsoft) and UUID are the same 128-bit identifier family. This tool generates UUID version 4 (random) in your browser — useful for primary keys, correlation IDs and test data.
Yes when the browser supports crypto.randomUUID / getRandomValues. Older environments fall back to Math.random.
No. Generation and validation run entirely in your browser.