UUID and GUID Generator

Looking for a simple and quick Online UUID and GUID generator? Generate single and multiple unique UUID and GUID for free.

How to generate a new UUID and GUID?

  1. To generate a new UUID and GUID, simply click on the refresh icon
  2. Then, click on the copy icon to copy the newly generated UUID and GUID

How to generate bulk UUID and GUID?

  1. First, click on the Bulk Generate field and input how many records you want to generate
  2. Then simply click on the refresh icon to start the generating process
  3. Finally, click on the copy icon to copy the newly generated UUID or GUID
  4. Or, click on the download icon to download newly generated UUID or GUID

Online UUID Generator - UUID Version 4

2a896561-95a2-4f88-b933-d36e72ec720c

UUID Version 4 Generator

ce0c9bd9-3640-41f6-91e6-c1e7cad39274
Bulk Generate

146a508f-141e-4be5-91e9-2d282ef5d30e

5a6fb92b-4dda-40d5-90ce-33f98c2e726d

1ff36f14-4d32-4cb5-8a8c-27999684f922

a9156fa4-ece4-4fa4-9e35-1e587d01c3f3

15b4a282-c347-4607-ae2e-bd1ee844893e

68f85f12-cdeb-4773-b016-86a8bb095170

fcd00b0d-5b15-4be0-9efd-87a8cb4b3963

7eed8d2c-212a-4731-bcf0-a082006e4e81

bd31c905-d564-470d-9b2e-477d1b8d9772

7578b760-ec12-458c-8d34-79190ad0dc6f

UUID Version 1 Generator

32fef090-72e1-11ed-b3e5-ffb0eb55b5aa
Bulk Generate

32fef091-72e1-11ed-b3e5-ffb0eb55b5aa

32fef092-72e1-11ed-b3e5-ffb0eb55b5aa

32fef093-72e1-11ed-b3e5-ffb0eb55b5aa

32fef094-72e1-11ed-b3e5-ffb0eb55b5aa

32fef095-72e1-11ed-b3e5-ffb0eb55b5aa

32fef096-72e1-11ed-b3e5-ffb0eb55b5aa

32fef097-72e1-11ed-b3e5-ffb0eb55b5aa

32fef098-72e1-11ed-b3e5-ffb0eb55b5aa

32fef099-72e1-11ed-b3e5-ffb0eb55b5aa

32fef09a-72e1-11ed-b3e5-ffb0eb55b5aa

Fast UUIDs and GUID generator

Quickly generate UUIDs and GUID. Just click on Generate button to generate random UUIDs instantly. Since everything processes inside your computer, no extra bandwidth is wasted uploading and downloading from our server.

Generate Any UUID and GUID Versions

Generate UUIDs and GUID of any versions available from Version 1 to Version 5. Just click on the Generate Button to generate single and multiple

No Installation Needed

By using our Online Case Converter, you are no longer need to worry about downloading a program or installing anything again. No software, no program, no app installation is required. Not even signing up to use the service.

All Platforms Supported

Our Online UUID and GUID generator tools is compatible with any platform. So you can freely access our application from iPhone, Android, Mac, Windows, and Linux.

Data Protection Guaranteed

Protecting user data and privacy is our top priority. None of the user data or files is uploaded and stored at our server. Everything is generated inside the user's device.

Completely Free of Charge

100% free, no limits on file size or the number of documents converted, no subscription, and lifetime access

What is a UUID?

UUID (Universally Unique Identifier) represents a very long string of a 128-bit long unique identification value. The UUID is expressed as a string consisting of 8 hexadecimal digits, each followed by a hyphen, then three groups of 4 hexadecimal digits, each followed by a hyphen, then 12 hexadecimal digits. Due to their extremely low probability of duplication, UUIDs are a widely adopted tool for giving persistent and unique identities to practically every type of all practical purpose.

How Unique is UUID?

From Wikipedia, the number of UUIDs generated to have at least 1 collision is 2.71 quintillion. At a rate of one per second, would take a billion years and is equivalent to generating around 1 billion UUIDs per second for about 85 years.

A collision is possible but the total number of unique keys generated is so large that the possibility of a collision is almost zero. So they are unique enough for practical purposes, taking into account the natural limitations of human and systems lifespans is low enough to be ignored.

UUID Versions Explained?

There are five different versions of UUID. Each version has different strengths and ways of creating and suiting different use cases.

  1. UUID Version 1 is sometimes referred to as “time-based” since they incorporate the DateTime at which they were generated. Simply speaking, it's a combination of the MAC address of the machine and the current timestamp in nanoseconds.
  2. UUID Version 2 is similar to Version 1 UUID but the part of DateTime information that would be in a v1 UUID is replaced by a local domain number. While this can be beneficial in some situations, it limits the uniqueness of the UUID and raises certain privacy concerns which result in version 2 UUID is not being widely used.
  3. UUID Version 3 is created based on “namespace” and “name” data rather than time-based and host-related values using message-digest algorithm (MD5) as the hashing algorithm to generate a UUID.
  4. UUID Version 4 is generated randomly. Its value is randomly generated from a cryptographically secure generator that does not contain any namespace, device, or time-based information.
  5. UUID Version 5 is generated the same way as version 3. However, it is generated using a Secure Hash Algorithm (SHA-1), which is a stronger hashing algorithm as opposed to MD5 which version 3 uses for hashing. Nowadays the MD5 hashing algorithm is considered vulnerable and easier to crack. However, SHA-1 is also facing the same security issue as MD5. So it's not recommended to use both UUID versions anymore.

Which UUID Version Should You Use?

The short answer is:

  • If you want to generate a truly >random and unique UUID, then Version 4 is recommended over Version 1
  • If you need a reproducible version of UUID, then Version 5 is recommended because Version 5 is more secure as it uses SHA-1 Hash while Version 3 uses MD5

What is the difference between UUID and GUID?

Universally Unique Identifier (UUID) and Globally Unique Identifier (GUID) is a 16 bytes (128bits) value that looks and serves a similar purpose of uniqueness. The only difference between the two is that, UUID is defined by RFC4122 while GUID is Microsoft's implementation of a the UUID.

FAQ

Can I use EZTools.io to generate UUID and GUID on my Android device?

EZTools.io supports all mobile platforms such as iPhone, iPad, and Android. It is also working on other platforms including Windows, Mac, or Linux. In short, EZTools.io is working on any device with a browser and internet connection.

Can I use EZTools.io to generate UUID and GUID on my iPhone and iPad devices?

EZTools.io supports all mobile platforms such as iPhone, iPad, and Android. It is also working on other platforms including Windows, Mac, or Linux. In short, EZTools.io is working on any device with a browser and internet connection.

Can I use EZTools.io to generate UUID and GUID on my Windows, Mac, or Linux?

EZTools.io supports all of the above OS, not limited to mobile platforms such as iPhone, iPad, and Android. In short, EZTools.io is working on any device with a browser and internet connection.