🆔 UUID Generator
Generate UUID v4, UUID v7 (time-sorted), and ULID identifiers. Batch up to 100 at once.
When to Use Each ID Type
| Type | Format | Best For |
|---|---|---|
| UUID v4 | 550e8400-e29b-41d4-a716-446655440000 | General-purpose unique IDs, database primary keys |
| UUID v7 | 0192e8a0-7b11-7000-8000-123456789abc | Time-ordered database entries, better index performance |
| ULID | 01ARZ3NDEKTSV4RRFFQ69G5FAV | URL-friendly, sortable IDs, shorter than UUID |
Frequently Asked Questions
UUID v4 is fully random. UUID v7 embeds a timestamp in the first 48 bits, making it sortable by creation time. This gives better database index performance for time-ordered inserts.
Yes. This tool uses the browser's crypto.getRandomValues() API, which provides cryptographically secure random numbers suitable for production use.
Use ULID when you need shorter, URL-friendly identifiers that are still unique and sortable. ULID is 26 characters vs UUID's 36, and it's case-insensitive, making it better for public-facing IDs.