Theoretically, the probability of a UUID v4 collision is astronomically small, relying on a 122-bit random number space. Even if you continue to generate them for trillions of years, a collision is highly unlikely.

Yes, it is completely free. No user registration or app installation is required at all.

Will they disappear when I close the browser?

Yes. The generated UUIDs are never saved on the server. Please copy and save them if necessary.

What is the difference between UUID v4 and v7?

v4 is the standard UUID based on pure random numbers. v7 is a next-generation UUID that includes a millisecond timestamp at the beginning, allowing it to be sorted in chronological order, which improves DB index performance.

Will it become invalid if I remove the hyphens?

A 32-character string without hyphens is also a valid identifier as a UUID. Please use it as appropriate according to your system requirements.

🔑

uuid-generator,

UUID 一括ジェネレーター

Instantly output massive amounts of GUIDs completely locally. No server data sent, no registration required.

✨

Secure

WebCrypto API random

⚡

Bulk Generate

Array of 1000 in an instant

🚀

v7 Supported

Sortable latest v7

Count

Version

Hyphens

about,

About

A free tool to securely generate UUIDs (Universally Unique Identifiers) exclusively within your browser. It utilizes the secure random numbers of the WebCrypto API to generate large quantities of highly random identifiers. Nothing is sent to any server.

how to use,

How to Use

STEP 1

Select Quantity

Enter the number of UUIDs you need (1-1000).

STEP 2

Select Version

Normally use v4. Select v7 if DB indexing performance is important.

STEP 3

Copy and Use

Press the Generate button to display the list of UUIDs. Select all in the text area and copy.

glossary,

Glossary

UUID v4: The standard UUID based entirely on random numbers. The format is expressed as an 8-4-4-4-12 hexadecimal string.
UUID v7: A next-generation UUID containing a millisecond timestamp at the beginning. It can be sorted in chronological order, improving DB indexing performance.
Hyphens: The symbol used to divide the UUID into 8-4-4-4-12. The removal option turns it into a continuous 32-character string.

faq,

FAQ

Q.Will UUIDs overlap?: Theoretically, the probability of a UUID v4 collision is astronomically small, relying on a 122-bit random number space. Even if you continue to generate them for trillions of years, a collision is highly unlikely.
Q.Is it free to use?: Yes, it is completely free. No user registration or app installation is required at all.
Q.Will they disappear when I close the browser?: Yes. The generated UUIDs are never saved on the server. Please copy and save them if necessary.
Q.What is the difference between UUID v4 and v7?: v4 is the standard UUID based on pure random numbers. v7 is a next-generation UUID that includes a millisecond timestamp at the beginning, allowing it to be sorted in chronological order, which improves DB index performance.
Q.Will it become invalid if I remove the hyphens?: A 32-character string without hyphens is also a valid identifier as a UUID. Please use it as appropriate according to your system requirements.