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Generate UUIDs Online

v1, v4, v7 UUIDs

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A UUID generator produces 128-bit universally-unique identifiers in the canonical 8-4-4-4-12 hex format. the StuHub generates v4 (random) by default using crypto.randomUUID() and can also emit v1 (time-based) when you need a lexicographically sortable component.

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UUID Generator

Generate cryptographically random UUIDs; v4 (purely random) or v7 (time-ordered, RFC 9562). v4 is the standard choice for most IDs; v7 is better when you want IDs that sort chronologically at the database level, which can dramatically reduce index fragmentation. Generate up to 1000 at a time and download them as a text file.

How to use

Pick v4 (random) or v7 (time-ordered).
Set the count.
Click Generate.
Copy or download the list.

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Version

Count10

11000

UUIDs10 generated

a1e132c6-7f51-4e89-8cf5-c7aab9b679b5
c2f86916-70e3-4200-ac33-181930848b55
f5745625-4127-4215-af6e-c89998cba297
5813a848-9178-4d4f-824f-bbe2da548b46
e5442fa5-4b43-4f09-89ce-0fe834ae93a8
9ff1294e-a480-40ea-ba7d-64ab88b98d96
9fc05cde-b49e-4825-be92-095ffc7c0412
5ad28827-1fc9-4370-b5f1-9c8f54f8c08d
862fc521-70b1-4b13-8ee9-7acbe7602aee
e99e472c-8be5-49e5-80a7-d149856838c1

v4 UUIDs are cryptographically random. Uses crypto.randomUUID when available.

What is UUID Generator?

How do I use UUID Generator?

Pick v4 (random) or v7 (time-ordered).
Set the count.
Click Generate.
Copy or download the list.

UUID Generator by the numbers

Versions: v4 (random), v1 (time-based)
RNG: crypto.randomUUID / getRandomValues
Batch size: Up to 10,000 per run
Formats: With hyphens, without, uppercase
Export: Copy, download .txt / .csv

Common use cases for UUID Generator

Seeding primary keys for a database migration.
Generating 10,000 test IDs for a load-test fixture.
Creating a one-off correlation ID for a support ticket.
Producing a stable anonymous session ID inside a script.
Filling a column of unique values in a CSV.

Common pitfalls and how to avoid them

v4 IDs leak ordering across requests — They do not; v4 is random. If you need order, switch to v1 (time-based) or v7 (ordered, post-draft).
Hyphens are not wanted — Toggle "No hyphens"; the output becomes a raw 32-char hex string.
Copying 10k IDs is slow — Use the "Download .txt" option instead of copy-to-clipboard for large sets.

When should I use UUID Generator?

Use v4 when you don't need ordering. Use v7 when inserting rows in many-IDs-per-second workloads where index locality matters. For sequential, human-friendly IDs, neither is right; a tiny custom scheme is better.

Frequently asked questions

Which UUID version does it generate?

v4 by default (random) and v1 (time-based) on demand. v4 is what almost every application wants; v1 is only useful if you need a time-ordered component embedded in the ID.