About UUID Generator

Generates RFC 4122 version 4 UUIDs using the browser’s crypto.randomUUID() method. Produce up to 50 UUIDs at once with options for uppercase formatting and hyphen removal. Each UUID is individually copyable, and the full batch can be copied as a newline-separated list.

• Uses crypto.randomUUID() for cryptographically secure random UUID v4 generation
• Batch generation from 1 to 50 UUIDs in a single click
• Formatting toggles: uppercase (lowercase by default) and strip hyphens (36 chars → 32 chars)
• Individual copy buttons per UUID plus a bulk “Copy All” as newline-delimited text
• Each UUID displayed with its format metadata (hyphenated/plain, upper/lowercase)

Frequently Asked Questions

Are these UUIDs truly random?

Yes. crypto.randomUUID() uses the operating system’s cryptographic random number generator. These are UUID v4 identifiers with 122 bits of randomness—the collision probability is negligible for any practical use case.

What’s the difference between hyphenated and non-hyphenated format?

Standard UUID format is 8-4-4-4-12 hex digits with hyphens (36 characters). Stripping hyphens gives you 32 contiguous hex characters. Some databases and APIs expect one or the other; most accept both. The underlying value is identical.