Bulk Generator Features
Fast Generation
Generate 10,000 UUIDs in under a second. All processing happens in your browser using optimized JavaScript.
100% Client-Side
Nothing is sent to any server. All UUIDs are generated locally in your browser using the Web Crypto API.
Multiple Exports
Export your UUIDs as plain text (TXT), spreadsheet-ready (CSV), or structured data (JSON) formats.
Common Use Cases for Bulk UUIDs
Generating UUIDs in bulk is useful for many development and testing scenarios:
Database Seeding
Populate development or test databases with realistic UUID primary keys. Export as CSV for easy database imports — see our mysql uuid guide for storage strategies and best practices when inserting bulk UUIDs into MySQL tables.
API Testing
Generate lists of UUIDs for load testing, stress testing, or simulating multiple concurrent users/resources.
Fixture Generation
Create test fixture files with pre-generated UUIDs. Export as JSON for easy integration with test suites.
Data Migration
Generate replacement IDs when migrating from auto-increment to UUID primary keys in databases.
Which UUID Version for Bulk Generation?
Choosing the right version matters for your use case. The uuid v4 generator is the most widely used option for general-purpose bulk IDs, while the uuid v1 generator is a good choice when each ID must encode its creation time:
| Version | Best For | Ordering |
|---|---|---|
| UUID v4 | General purpose, testing, most use cases | Random (no order) |
| UUID v7 | Database seeding, time-ordered data | Time-sorted (lexicographic) |
| UUID v1 | Legacy systems, audit trails | Time-based (Gregorian) |
| GUID | .NET, SQL Server, Windows | Random (uppercase, braces) |
💡 Recommendation
For most bulk generation needs, UUID v4 is the best choice—it's random, widely supported, and has no ordering implications. If you're seeding a database and want time-ordered IDs, use UUID v7.