ULID Generator은(는) 무엇을 하나요?
ULID Generator은(는) 브라우저에서 결과 생성을(를) 수행하며 결과와 제한을 명확히 설명합니다. 검증된 기능: Cryptographic random bits, Sortable identifier output, Bulk generation, Timestamp inspection.
ULID favors sortable identifiers
Choose ULID when lexicographic sorting by approximate creation time is useful. Choose UUID v4 for a widely supported opaque random identifier, or a database-native sequence when centralized ordering is acceptable.
사용 방법
- Choose a count from 1 to 100 and select Generate.
- Copy the 26-character Crockford Base32 values in the order produced.
- Paste any ULID into Inspect ULID to validate it and read its embedded millisecond timestamp.
실제 입출력 예시
Inspect the canonical ULID example
입력
01ARZ3NDEKTSV4RRFFQ69G5FAV출력
Status: Valid
Timestamp: 2016-07-30T23:54:10.259Z
Random bits: 80The first ten characters encode a 48-bit Unix-millisecond timestamp; the remaining sixteen encode 80 random bits.
일반적인 오류와 해결 방법
| 현상 | 가능한 원인 | 해결 방법 |
|---|---|---|
| A 26-character value is marked invalid. | It contains excluded Crockford characters such as I, L, O, or U, or its first character would overflow 128 bits. | Use the ULID alphabet and require the first character to be 0 through 7. |
| Generated values reveal when records were created. | Time ordering is an intentional ULID property. | Choose UUID v4 when exposing approximate creation time is undesirable. |
Important behavior of ULID Generator
이 도구의 구체적인 제한: Time ordering reveals approximate creation time; choose UUID v4 when that disclosure is unwanted.
표준 및 구현 참고 자료
- ULID specification (opens in a new tab)Defines the 128-bit layout, Crockford Base32 encoding, timestamp, and randomness fields.
- MDN — Crypto.getRandomValues() (opens in a new tab)Documents the cryptographic random-byte source used by the generator.
ULID Generator — FAQ
Does the ULID Generator upload my input?
No. Processing runs in the current browser tab, and the page does not send tool input to a KitLumi processing endpoint.
What input does the ULID Generator accept?
It accepts a requested count from 1 to 100 or a ULID to inspect. The workspace checks the input and reports malformed or unsupported values before it produces a result.
What does the ULID Generator produce?
It produces Crockford Base32 ULIDs and decoded creation timestamps. Copy and download controls appear when the output format supports them.
What limitation should I know?
Time ordering reveals approximate creation time; choose UUID v4 when that disclosure is unwanted.
변경 사항
실질적인 업데이트: ULID Generator: Added Cryptographic random bits, Sortable identifier output, Bulk generation, Timestamp inspection, responsive controls, explicit runtime disclosure, and task-specific examples and limitations.