ID 类型
格式选项
关于 UUID v4
Randomly generated UUID (Version 4)
示例：
550e8400-e29b-41d4-a716-446655440000优点：
- Cryptographically random
- No collision risk
- Platform independent
- RFC 4122 compliant
Randomly generated UUID (Version 4)
示例：
550e8400-e29b-41d4-a716-446655440000优点：
Software systems need a reliable way to assign identifiers that will never collide with another record, whether that record lives in your database, a distributed microservice, or a config file shared across teams. Manually typing IDs or using auto-incrementing numbers falls apart the moment you have multiple systems generating data independently — two services can easily produce the same sequential number. This tool solves that by generating identifiers with mathematically negligible collision odds, right in your browser, so you can grab a fresh ID the moment you need one without spinning up a script or installing a library.
The generator supports four identifier formats, each suited to different needs: UUID v4, built from random bits, is the default choice for general-purpose unique IDs; UUID v1 encodes a timestamp and node information, useful when you want IDs that are roughly sortable by creation time; ULID produces a lexicographically sortable, URL-safe identifier that's popular in modern database schemas; and nanoid gives you a compact, URL-friendly string for cases where a full 36-character UUID is overkill. You can generate a single ID or produce a batch of them at once, then copy the results instantly with one click instead of selecting and copying text by hand.
Because everything runs client-side in your browser, none of the IDs you generate are transmitted anywhere or logged on a server — useful if you're generating identifiers for internal systems, test fixtures, or sensitive data models and don't want that activity leaving a trace. A common workflow is bulk-generating a batch of UUIDs to seed a test database or populate placeholder records, then pasting the whole list directly into your code or SQL insert statements.
Generate one or many unique identifiers in your chosen format and copy them for immediate use.
Select the identifier type you need: UUID v4, UUID v1, ULID, or nanoid.
Enter how many IDs you want — a single identifier or a bulk batch for seeding data or tests.
Click the generate button to instantly produce the identifier(s) in your browser.
Check the generated ID or list of IDs displayed on the page.
Click the copy button to instantly copy a single ID or the full batch to your clipboard for pasting into your code, database, or config.