UUID Generator

Use it when your task matches one of these common needs: Generate IDs for mock data, test records, fixtures, or local prototypes. Create one UUID or a small batch at once. It works best when you already know the text, code, URL, mode, format, or technical setting the page asks for.

In plain language: The generator creates random bytes in the browser, sets the UUID version and variant bits for UUID v4, then formats the identifier. The examples on the page are there so you can compare your inputs with a filled-out example before copying the answer.

The main inputs are usually text, code, a URL, a number base, or a mode setting. Paste only the part you want the tool to work on and compare the output with the examples.

Read the output next to your original input. If the tool changes format, units, encoding, spacing, or capitalization, compare a small sample before copying the whole result into another app.

UUIDs are useful identifiers, but they do not prove identity, authorization, ordering, or secrecy by themselves. Also check the selected mode, input format, encoding, and whether the text includes private keys, passwords, or sensitive data.

No. UUID v4 values are random identifiers, not timestamps or ordered numbers. They are good when you need a hard-to-guess unique-looking ID, but they should not be used when a database, log, or file list needs chronological order.

Do not treat a UUID as a password reset token, login secret, API key, or proof of permission. For security workflows, use a purpose-built random token with enough entropy, short expiration, server-side storage or hashing, and checks that match your app threat model.

No. The tool runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.