Generates version 4 (random) UUIDs like 550e8400-e29b-41d4-a716-446655440000 using the browser's cryptographically secure random source (crypto.randomUUID). Generate up to 500 at once, one per line, with uppercase or no-dash formatting for database keys and identifiers.
UUID v4 has 122 random bits — collisions are practically impossible. Everything runs locally in your browser.