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Utilnivo

Developer

Utilnivo

Bulk UUID Generator

Generate many UUIDs at once for test datasets, seeds, and fixtures.

No registration
  • On your device

Browse more in Developer or all tools.

What is a UUID generator?

A UUID generator creates random unique identifiers (v4) for databases, APIs, and test data. IDs are generated locally in your browser.

Private on your device

Your information stays on your device and is not uploaded.

Related tools

This bulk UUID generator creates dozens or hundreds of unique identifiers in one click for database seeds, load-test fixtures, and spreadsheet imports. Copy the full list locally without uploading data to a server.

Bulk UUIDs are independent random v4 values—collision risk remains negligible at practical batch sizes.

For production migrations, coordinate ID generation with database constraints and replication lag.

How to use this tool

Set the desired count, generate the batch, and copy all UUIDs as newline-separated or comma-separated text.

Worked example

Example: generate 50 UUIDs and paste into a CSV `id` column for a JMeter load test against a staging orders API.

When to use this

  • Seeding integration test databases.
  • Populating mock API collections in Postman.
  • Creating unique keys for bulk CSV imports.

Common examples

  • Generate v4 UUID for a new database primary key in local seed scripts.
  • Batch of five UUIDs for mock API fixtures in integration tests.
  • UUID for trace id in log correlation examples in documentation.
  • Ten UUID v4 values → seed rows for local integration test database.
  • UUID v7 batch → ordered IDs for event-sourcing demo data.

Common mistakes

  • Inserting bulk UUIDs without checking unique index violations in prod.
  • Using predictable sequences instead of random UUIDs when uniqueness matters.
  • Generating more IDs than your clipboard or script can handle at once.

How it works

Generates UUID v4 (random) or v7 (time-ordered) identifiers using crypto-random bytes on your device. Supports bulk generation with optional uppercase and hyphen formatting.

Limitations

Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.

Privacy and file handling

Your image stays on your device and is not uploaded.

Related UUID Generator pages

These pages use the same uuid generator with examples tailored to different tasks.

FAQ

Frequently asked questions

How many UUIDs can I generate?

Practical limits depend on browser performance—start with hundreds, not millions.

Are bulk UUIDs cryptographically random?

Standard v4 generation uses secure randomness in modern browsers.

Can I download as a file?

Copy the list and save as `.txt` or `.csv` from your editor or spreadsheet.

Related pages

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