Free2BoxFree2Box

Gerador de ULID

Gere Identificadores Universalmente Únicos Lexicograficamente Ordenáveis

Settings
Configure ULID generation options
1100

O que é ULID?

ULID (Identificador Universalmente Único Lexicograficamente Ordenável) é um identificador de 128 bits que é ordenável por tempo e compatível com UUID.

Marca Temporal (10 chars, 48-bit ms)
Aleatoriedade (16 chars, 80-bit)
ULIDs Gerados
Click generate to create ULIDs
Generated ULIDs will appear here

Como Usar

1

Insira Seus Valores

Preencha os campos de entrada com seus números ou parâmetros.

2

Obtenha Resultados Instantâneos

Os resultados são atualizados automaticamente enquanto você digita — sem botão de envio necessário.

3

Copie ou Salve

Copie os resultados para a área de transferência ou use-os no seu fluxo de trabalho.

Por Que Usar Esta Ferramenta

100% Gratuito

Sem custos ocultos, sem planos premium — todos os recursos são gratuitos.

Sem Instalação

Funciona inteiramente no seu navegador. Nenhum software para baixar ou instalar.

Privado e Seguro

Seus dados nunca saem do seu dispositivo. Nada é enviado a nenhum servidor.

Funciona no Celular

Totalmente responsivo — use no seu celular, tablet ou desktop.

ULID: Universally Unique Lexicographically Sortable Identifiers

Key Takeaways

  • ULIDs combine a 48-bit millisecond timestamp with 80 bits of randomness, creating IDs that are both unique and chronologically sortable.
  • ULIDs use Crockford's Base32 encoding, producing compact 26-character strings that are URL-safe and case-insensitive.
  • All ULIDs are generated in your browser — no data is sent to any server.

ULID (Universally Unique Lexicographically Sortable Identifier) addresses a key limitation of UUID v4: lack of natural ordering. By encoding the creation timestamp in the first 10 characters, ULIDs sort chronologically while maintaining global uniqueness through random suffixes. This makes them excellent primary keys for databases where insertion order matters.

ULIDs can generate 1.21 x 10^24 unique IDs per millisecond — more than enough for any application.

Throughput Capacity

Key Concepts

1

ULID Structure

A ULID consists of a 10-character timestamp (48 bits, millisecond precision, good until year 10889) followed by a 16-character random component (80 bits of entropy).

2

Crockford's Base32

ULIDs use Crockford's Base32 alphabet (0-9, A-Z excluding I, L, O, U) which avoids ambiguous characters. This encoding is URL-safe, case-insensitive, and more compact than hex.

3

ULID vs. UUID v7

Both embed timestamps for sortability. UUID v7 is an official IETF standard (RFC 9562) with broad ecosystem support. ULIDs are more compact (26 vs 36 chars) and use a simpler specification.

4

Monotonic ULIDs

When multiple ULIDs are generated within the same millisecond, monotonic mode increments the random component to guarantee strict ordering within that millisecond.

Pro Tips

Use ULIDs as database primary keys when you need time-ordered records without a separate created_at column.

Extract the timestamp from existing ULIDs for audit logging — no additional metadata storage needed.

Use monotonic ULID generation in high-throughput systems to guarantee strict ordering even at sub-millisecond rates.

ULIDs can be converted to UUID format (128-bit) for compatibility with UUID-typed database columns.

All ULIDs are generated entirely in your browser using cryptographically secure randomness. No generated identifiers are stored or transmitted to any server.

Perguntas Frequentes