Why Bulk Generate UUIDs?
Standard UUID Generators are designed to copy and paste a single ID into your source code. But when you are building robust applications, you frequently need to generate massive amounts of mock data for database seeding, stress testing, and performance benchmarking.
Our Bulk UUID Generator was built exclusively for developers who need volume. Utilizing background Web Workers, you can instantly spin up datasets of 1,000,000 unique UUIDs without crashing your browser tab. We offer direct exports to formats you actually use in production workflows:
- CSV (Comma-Separated Values): Perfect for importing into Excel, Google Sheets, or bulk-loading tools like PostgreSQL
COPY. - JSON (JavaScript Object Notation): Ideal for seeding document databases like MongoDB or mocking REST API responses.
- SQL (Structured Query Language): Generates raw
INSERT INTO ...statements so you can execute the dump directly against your MySQL or Postgres instance. - TXT (Raw Text): A simple line-by-line list, perfect for Bash scripts or piping into terminal commands.
How to Bulk Generate and Export UUIDs
- Enter the exact quantity of UUIDs you want to generate. For performance reasons, we cap generation at 1,000,000 per batch.
- Select your desired export format (TXT, CSV, JSON, or SQL). If you select SQL, you can specify the target table name.
- Click Generate Batch. The background worker will securely generate standard UUIDv4 strings.
- Once complete, a Download File button will appear. The file is constructed dynamically in your browser, meaning it downloads instantly over a local Blob URL without ever touching a server.
Frequently Asked Questions
Does generating 1,000,000 UUIDs freeze my browser?
No. We leverage modern HTML5 Web Workers. This means the heavy lifting of generating cryptographic randomness and formatting millions of lines of text happens in a separate background thread. Your browser UI remains completely responsive (maintaining a perfect Interaction to Next Paint score).
Are the UUIDs cryptographically secure?
Yes. Even at high volumes, we rely exclusively on the browser's native Web Crypto API (crypto.getRandomValues()) to guarantee that every single UUID in your CSV or JSON dump is genuinely random and completely unguessable. We never fall back to insecure math.random implementations.
Why don't you support larger than 1,000,000?
While the cryptography engine can easily handle it, generating the massive Blob text string required to package 1+ million UUIDs into a JSON or SQL dump will consume over 100MB of your computer's RAM. To prevent older devices from running out of memory (OOM), we cap batches at 1M. If you need more, you can simply click generate multiple times!