UUID generator

What this tool does

Each ID comes from crypto.randomUUID. These are random v4 UUIDs, not time-based v1 or sortable v7 identifiers. They are suitable as opaque IDs, not as secrets with extra meaning.

How to use it

1. Set the count.
2. Choose hyphen and case options.
3. Copy or download the list.

Privacy

This tool processes files and text locally in your browser. Your content is not uploaded or stored by this site.

ConvertPass does not include your input in analytics, URLs, or error reports. Encoding: ASCII. Limit: 500 UUIDs (2.00 MB).

Limitations

• Only version 4 is generated.
• Uniqueness is statistical, not coordinated across devices.

Example

count=2

7f1c3b2a-9d4e-4a6b-8c21-0f5d6a7b8c9d
2a9c1e4f-88b0-4d12-9e33-1a2b3c4d5e6f

The sample IDs are illustrative. Your output will be different every time.

Troubleshooting

crypto.randomUUID is missing

Use a current browser on a secure origin (HTTPS or localhost). Very old browsers do not implement this API.

FAQ

Are these sequential?

No. Version 4 UUIDs are random. Do not sort them and expect creation order.

Can I generate UUID v7?

Not in this version. v7 needs a specified timestamp layout. It may be added later as a separate, labelled mode.

Is a UUID a secret?

v4 UUIDs are hard to guess but they are identifiers, not passwords. Do not use them as API keys if your threat model includes database leaks of those IDs.

Why cap batches at 500?

It keeps the page responsive. Generate another batch if you need more.