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MAC Address Generator
Generates random MAC addresses in any format, with optional vendor prefix and locally…
UUID Generator
Generates cryptographically random UUIDs in versions 4 and 7, plus nil and max UUIDs, in bulk.
Developer
Nothing uploaded
No sign-up
Free, unlimited
Fill in the fields and press Generate.
In short
UUID Generator is a free online tool on inputtesthub.com that generates cryptographically random UUIDs in versions 4 and 7, plus nil and max UUIDs, in bulk. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.
How to use the UUID Generator
- Set the range, count and options you need.
- Press Generate to produce a fresh set of values.
- Copy the whole set, or click any single value to copy it on its own.
About the UUID Generator
The UUID Generator generates cryptographically random UUIDs in versions 4 and 7, plus nil and max UUIDs, in bulk. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Seeding test data with unique identifiers.
- Generating a primary key for a new record.
- Creating a correlation ID for tracing a request.
Details
| v4 | 122 random bits from crypto.getRandomValues — collision risk is negligible |
|---|---|
| v7 | Millisecond timestamp prefix plus randomness, so IDs sort chronologically and index better in databases |
| Randomness source | The Web Crypto API, not Math.random |
Frequently asked questions
Does the UUID Generator cost anything?
There is no cost and no cap. The UUID Generator is not a demo of a paid product, so nothing is held back or watermarked.
Is my data uploaded anywhere?
No. The UUID Generator runs entirely in your browser using JavaScript. Nothing is transmitted, logged or stored, which you can verify yourself in the Network tab of your browser's developer tools.
What do people use the UUID Generator for most?
Typical uses: seeding test data with unique identifiers. Generating a primary key for a new record. Creating a correlation ID for tracing a request. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
What figures does the UUID Generator work from?
V4 is 122 random bits from crypto.getRandomValues — collision risk is negligible. v7 is Millisecond timestamp prefix plus randomness, so IDs sort chronologically and index better in databases. Randomness source is The Web Crypto API, not Math.random. These are printed on the page itself, so you do not have to take them on trust.
Will this work on a tablet?
Yes. The page is responsive and the tool works in Chrome, Safari, Firefox, Edge and Samsung Internet on both Android and iOS. There is no app to install and nothing to sign into.
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