# UUID Generator Generate cryptographically-random version‑4 UUIDs — one or in bulk — with uppercase, no-dashes, braces and quoted-list formatting. Uses the browser's secure random source; nothing is uploaded. ### How it works A version‑4 UUID is 122 random bits with a fixed version and variant — about 5.3×1036 possibilities, so collisions are effectively impossible. These are generated with `crypto.randomUUID()`, which draws from the operating system's cryptographically-secure random source, entirely on your device. --- *Source: [ocxly.com/uuid-generator.html](https://ocxly.com/uuid-generator.html) — OCXLY, free 100% client-side privacy-first tools. Free UUID generator. Create cryptographically-random version-4 UUIDs one at a time or in bulk, with uppercase, no-dashes, braces and quoted-list formatting. Runs entirely in your browser.*