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UUID Generator (v4 & v7)

Generate random v4 or time-ordered v7 UUIDs in bulk. RFC 9562 compliant, powered by the Web Crypto API, with one-click export to CSV, JSON, JS array, or Playwright. Runs in your browser. No data sent.

Fully random. The most common UUID.

1–100

0 items

How It Works

  1. 1

    Pick a version

    v4 random or v7 time-ordered.

  2. 2

    Set quantity

    1 to 100 UUIDs per batch.

  3. 3

    Choose a format

    Plain text, CSV, JSON, JS array, or Playwright.

  4. 4

    Copy or download

    Drop them into fixtures, seeds, or a test file.

Use Cases

  • Seed test databases

    Generate stable, unique primary keys for fixtures and seed scripts.

  • Time-ordered keys

    Use v7 so records sort by creation time without a separate timestamp column.

  • Mock API identifiers

    Populate id fields in mock responses and Postman collections.

  • Correlation IDs

    Produce request or trace IDs for logging and distributed-tracing tests.

Frequently Asked Questions

It generates version 4 (random) or version 7 (time-ordered) UUIDs in bulk, right in your browser, with one-click export to CSV, JSON, JS array, and Playwright test format.
v4 is fully random — the default, and ideal when you just need a unique identifier. v7 prefixes a millisecond timestamp, so v7 UUIDs sort by creation time. That makes them friendlier as database primary keys because inserts stay roughly sequential.
The random bits come from the browser's Web Crypto API (`crypto.getRandomValues`), the same source used for secure tokens. They are suitable for identifiers and test data.
Yes. Version and variant bits are set per RFC 9562 (which supersedes RFC 4122), so v4 and v7 outputs are spec-compliant and will validate anywhere.
Yes. Choose "Playwright test" from the format dropdown to get a ready-to-run loop, or JSON / CSV / JS array for fixtures and seed data.
No. Generation happens entirely in your browser. No network calls, no storage, no logging.

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