Generate random UUIDs (v1, v4) and GUIDs for development
Random UUID
Generate 1 to 100+ UUIDs at once for database seeding, test fixtures, or batch operations.
Output as standard format, no hyphens, uppercase, or JSON array depending on use case.
Generates valid UUIDs compatible with all database systems, frameworks, and programming languages.
Everything runs inside your web browser. We never upload your text, files, or personal data to any servers.
No sign-ups, no subscriptions, and no usage limits. Get your results instantly in a single click.
v1 uses timestamp and MAC address (time-based, sequential). v4 uses cryptographically random numbers. v4 is preferred for privacy; v1 is useful when sequential ordering matters.
Yes, statistically. UUID v4 has 122 random bits, making collisions practically impossible (1 in 5.3×10^36 chance).
No, UUIDs are randomly generated and cannot be deterministically recreated. Store them when they are generated.
Yes for development and prototyping. For production security-critical systems, use your language's native UUID library.
No, all generation happens client-side in your browser. Nothing is stored or transmitted to any server.
Yes, completely. All calculations and file conversions happen entirely inside your own browser. We do not store, view, or upload any of your input data to our servers.
No. UtilsGo is 100% free. You don't need to create an account, register, or pay for any features.
Built by UtilsGo • Last updated May 2026 • No ads • No tracking