Quantity
1
ULID
01ARZ3NDEKTSV4RRFFQ69G5FAV
Developer Tools
ULID Generator for Sortable Unique IDs
Generate one or many ULIDs with timestamp-first Crockford Base32 encoding for sortable identifiers and database keys.
ULIDIdentifierDatabase
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开发工具
ULID Generator
Generate one or many ULIDs with timestamp-first Crockford Base32 encoding for sortable identifiers and database keys.
ULID (Universally Unique Lexicographically Sortable Identifier) is sorting compatible, 1.21e+24 unique per millisecond, securely random.
OUTPUT (JSON Array)
ULIDs ready.
Use cases
- Create sortable string keys for a database
- Reduce random UUID index churn in distributed writes
- Prepare unique identifiers for test data
How to use
- Choose how many ULIDs to generate
- Select Generate
- Copy the list or JSON output
Example input and output
FAQ
How is a ULID different from UUID v4?
A ULID starts with timestamp data and is lexicographically sortable. UUID v4 values are intentionally unordered.
Can I use it as a globally unique primary key?
ULIDs provide high-entropy identifiers, but critical systems should still enforce uniqueness at the data layer.
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