ULID Generator

About this Tool

While UUIDs are great, their complete randomness means they fragment database indexes and cannot be sorted by creation time. ULIDs solve this. They encode a millisecond-precision timestamp in the first 48 bits, followed by 80 bits of cryptographic randomness. This means they are completely unique, but can be safely sorted chronologically in your database.

Frequently Asked Questions

¿Son los ULIDs compatibles con columnas UUID?

Ambos son identificadores de 128 bits. Aunque se ven diferentes como strings (los ULIDs usan codificación Base32 de 26 caracteres, los UUIDs usan Hex de 36 caracteres), ambos se pueden almacenar en columnas de base de datos estándar de 128 bits (como los tipos UUID en Postgres) si se convierten adecuadamente.

¿El ULID es case-sensitive?

No. El encoding Base32 estándar utilizado para ULIDs excluye caracteres confusos como I, L, O y U, y es completamente case-insensitive.

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