UUID Generator

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About this Tool

Generate RFC 4122 version-4 UUIDs in bulk using the browser’s cryptographic random APIs—ideal for seeding database keys, test fixtures, and collision-resistant filenames. AllThatConverter creates up to hundreds of IDs per click with optional casing, then lets you copy or download the list without sending entropy or identifiers to a server. Useful for offline scaffolding when you cannot hit a cloud UUID service.

Processed safely on your device

Everything happens in your browser on this device. Your files are never sent to our servers—so you can use it with peace of mind.

How to Use

1

Set how many v4 UUIDs you need (within the tool’s batch limit).

2

Choose casing options if available (lower/upper) to match your codebase style.

3

Generate the list instantly in the browser using secure random sources.

4

Copy all IDs or download them as a text file for fixtures and migrations.

Key Scenarios & Use Cases

Seed Database Primary Keys

Create unique IDs for mock tables, staging data, and migration scripts without colliding with production.

Issue Session or Correlation IDs

Provision high-entropy identifiers for local logging, tracing demos, and offline prototypes.

Rename Uploads Without Collisions

Generate unique object names for asset pipelines before uploading to storage buckets.

Fill Test Fixtures Quickly

Bulk-create UUIDs for unit tests that assert uniqueness and foreign-key relationships.

Frequently Asked Questions (FAQ)

Version 4 (random) UUIDs aligned with RFC 4122, suitable for most application identifiers.

v4 UUIDs use cryptographically strong randomness in modern browsers. Collision risk is negligible for typical app volumes.

Yes. Set a batch count up to the UI limit (commonly up to a few hundred) and copy or download the full list.

No. Generation happens in-browser. Nothing is logged to AllThatConverter servers.

No. UUIDs are unordered random IDs. Use a separate sequential series when humans need readable counters.

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