Yes. UUID Generator is completely free, with no sign-up, no daily limit, and no watermark on what you download.
No. UUID Generator runs entirely in your browser using JavaScript — nothing you type or upload ever leaves your device.
A Universally Unique Identifier — a 128-bit label like 550e8400-e29b-41d4-a716-446655440000. Version 4 UUIDs are random, so collisions are practically impossible.
