---
title: UUID Generator — v1, v4, v7 Bulk Generation Online
url: https://varstatt.com/toolkit/uuid
description: Generate UUID v1, v4, and v7 online. Bulk generation up to 1,000 UUIDs. Toggle uppercase, hyphens. Export as TXT or CSV.
section: Developer Toolkit (https://varstatt.com/toolkit)
tags: generators
related: UUID (https://varstatt.com/toolkit/uuid), Hash (https://varstatt.com/toolkit/hash), Password (https://varstatt.com/toolkit/password)
---
# UUID Generator

Generate UUID v1, v4, and v7 online. Bulk generation up to 1,000 UUIDs. Toggle uppercase, hyphens. Export as TXT or CSV.

## How It Works

1. **Choose a version** — Select UUID v4 (random), v1 (timestamp-based), or v7 (sortable timestamp) based on your needs.
2. **Generate one or many** — Generate a single UUID or use bulk mode for up to 1,000 at once.
3. **Format and export** — Toggle uppercase/lowercase and hyphens. Copy individual UUIDs or export bulk results as TXT or CSV.

## FAQ

### Which UUID version should I use?

v4 (random) for most cases. v7 if you need time-sortable IDs (great for database primary keys). v1 if you need timestamp extraction. If you need a deterministic ID derived from input data, use the [hash generator](https://varstatt.com/toolkit/hash) instead.

### Are the UUIDs truly random?

Yes. v4 UUIDs use crypto.randomUUID() or crypto.getRandomValues(), which are cryptographically secure.

### Can UUID v4 collide?

Theoretically yes, but the probability is astronomically low — about 1 in 2^122. You'd need to generate billions per second for centuries.

## Usage

This tool runs entirely in the browser — visit the URL above to use it.

Prefill inputs via URL parameters:

- `https://varstatt.com/toolkit/uuid?count=...`

## Related Tools

- [UUID](https://varstatt.com/toolkit/uuid)
- [Hash](https://varstatt.com/toolkit/hash)
- [Password](https://varstatt.com/toolkit/password)