UUID VERSION 4 · 122 RANDOM BITS

UUID v4 Generator

Gerar UUID v4 identifiers online com our gratuito UUID v4 Generator. Criar secure aleatório UUID v4 values in bulk, choose formatoting options, copy resultados e download them as TXT ou JSON.

Browser-based generation • Uses Web Crypto API when available

Number of UUIDs

Output Format

UUID Version Version 4

Total Size 128 bits

Random Bits 122 bits

Random Source Web Crypto API

Generated UUID v4 Values

Generated: 0 Valid v4: 0 Format: Lowercase

Click Generate UUID v4 to create UUIDs.

O que é a UUID v4?

UUID v4 é um aleatoriamente gerado Universally Unique Identifier.A UUID contém 128 bits e is normally represented as a 36-characterhexadecimal string including hyphens.

UUID v4 uses aleatório data para most of its bits. Six bits are reservedfor the UUID versão e variante, leaving 122 bitsfor aleatório data.

UUID v4 Formato

A standard UUID v4 follows the8-4-4-4-12hexadecimal pattern:

xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx

The first hexadecimal character of the third group identifiesversão 4. The variante bits are contained in the first characterof the fourth group.

UUID v4 Exemplo

550e8400-e29b-41d4-a716-446655440000

In this example, the 4identifies the UUID asversão 4. The UUID variante is represented by the appropriatevariante bits in the fourth group.

UUID v4 Formatoo de saídas

Lowercase:standard UUID formato using lowercase hexadecimal characters.
Uppercase:standard UUID formato using uppercase hexadecimal characters.
Compact:32 hexadecimal characters sem hyphens.
Chaves:UUID enclosed inside curly braces.
URN:UUID represented using the UUID URN formato.

Why Use UUID v4?

No central ID server is required to generate identifiers.
UUID v4 oferece a very large aleatório identifier space.
It is widely supported by programming languages e bancos de dados.
UUIDs can be gerado independently across different systems.
They are useful para banco de dados records, APIs, aplicações e distributed systems.

UUID v4 vs UUID v7

UUID v4 is primarily aleatório, while UUID v7 contém a Unixmillisecond timestamp followed by aleatório data. UUID v7 can thereforeprovide time-ordered identifiers, while UUID v4 is useful whenaleatório identifiers are preferred.

Frequently Asked Questions

UUID v4 é um UUID versão that is gerado primarily de aleatório ou pseudo-aleatório data. It contém 128 bits in total, com specific bits reserved para the versão e variante.

UUID v4 contém 122 bits of aleatório data. The remaining 6 bits são usados to identify the UUID versão e variante.

O gerador creates 16 aleatório bytes in your browser e sets the required UUID v4 versão e RFC variante bits before displaying the UUID.

UUID v4 oferece a very large identifier space e is commonly used quando an aplicação needs identifiers sem relying on a central ID-generation service.

Sim. Você pode generate multiple UUID v4 identifiers in one operation e copy ou download the complete result.

Sim. O gerador suporta lowercase e uppercase UUID output as well as compact output sem hyphens.

Sim. Gerard UUID v4 values can be downloaded as a TXT file ou structured JSON data.

Sim. UUID v4 generation is performed locally in your browser using the Web Crypto API quando it is available. The gerado UUID values do not need to be sent to a server.

UUID v4 is primarily aleatório, while UUID v7 inclui a Unix millisecond timestamp e aleatório data, making UUID v7 suitable para identifiers that benefit de time-ordered characteristics.