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DDevToolery

ULID Generator

Generate lexicographically sortable 26-character identifiers.

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About this tool

Generates ULIDs: 26 characters of Crockford base32 encoding a millisecond timestamp followed by randomness. Like UUID v7 they sort by creation time, but they are shorter, case-insensitive and avoid characters that are easily confused.

Questions

ULID or UUID v7?
They solve the same problem. Choose UUID v7 when the value must go in a uuid database column; choose ULID when it is user-visible and the shorter form helps.

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