UUID Generator — Random Version 4 UUIDs Online

1. Choose how many UUIDs you need.
2. Click Generate UUIDs.
3. Copy a single value or the whole list.
4. Generate again for a new batch.

UUID Generator produces version 4 UUIDs — 128-bit identifiers whose digits are random except for a fixed version nibble (4) and variant bits. It draws from your browser's crypto.randomUUID, a cryptographically secure source, and formats each value as 36 characters in the canonical 8-4-4-4-12 layout. Because v4 has 122 random bits, the odds of two generated values ever colliding are vanishingly small, which makes them safe to use as keys without coordinating with a central server.

• Version 4 UUIDs are random, not time-ordered — if you need keys that sort by creation time, use UUID v7 or a ULID instead.
• With 122 random bits, v4 collisions are practically impossible, so you can generate them client-side without checking a server.
• The canonical form is lowercase; some systems compare case-sensitively, so normalize before storing or matching.
• A UUID is 36 characters with hyphens or 32 hex digits without them — pick one format and keep it consistent across your data.

• Generate cryptographically random v4 UUIDs
• Create 1, 5, 10, or 50 at once
• Copy a single UUID or the full list
• No duplicates within a batch
• Canonical lowercase 8-4-4-4-12 format

• Assigning a primary key to a new database row without a sequence or auto-increment.
• Tagging each API request with a correlation ID so you can trace it across logs.
• Naming uploaded files uniquely to avoid collisions in a shared bucket.
• Generating stable keys for items in a frontend list or an idempotency header.