Developer
Encoders, converters & dev utilities
Bulk UUID Generator — Generate Many UUIDs at Once
Sometimes you need not one UUID but hundreds or thousands — seeding test fixtures, generating load-test rows, or scripting a data migration. This bulk generator produces N UUIDs of your chosen version (v4 random, or v7 time-ordered) in a single click and lets you copy them all or download them as a newline-delimited list or a CSV column, ready to paste into a script or database seed. Everything is generated in your browser using the crypto CSPRNG, so even a large batch never touches a server. If you pick v7, the batch stays sortable in creation order thanks to a monotonic tail within each millisecond — useful when the UUIDs will become sequential primary keys. Choose your version and count and export. Free, no login.
Generate N UUIDs in one click — pick the count and the version (v4 or v7)
- Copy all, or download as a newline-delimited list or a CSV column
- Workflow: seed test fixtures, load-test rows, or migration scripts
- All generated in-browser via the crypto CSPRNG — even large batches hit no server
- v7 batches stay sortable in creation order (monotonic tail within each millisecond)
- v4 batches are independent random values (8-4-4-4-12 hex, version 4)
- A step beyond clone tools that emit a single value at a time
Frequently asked questions
How do I generate many UUIDs at once?
Set the count (how many you need) and the version (v4 for random, v7 for time-ordered), then generate — the tool produces the whole batch in one pass. You can copy the entire list to your clipboard or download it as a newline-delimited file or a single CSV column, which drops straight into a database seed script, a fixtures file, or a spreadsheet. It is generated entirely in your browser, so there is no per-request limit imposed by a server.
Can I download the generated UUIDs?
Yes. After generating a batch you can export it as a newline-delimited text list (one UUID per line) or as a CSV column, both built client-side as a downloadable blob. That makes it easy to feed the UUIDs into test-data seeding, load-testing rows, migration scripts, or any workflow that expects a file. Nothing is uploaded — the file is assembled in your browser from the values you just generated.
If I bulk-generate v7 UUIDs, will they stay in order?
Yes. v7 UUIDs lead with a millisecond timestamp, and this generator makes the random tail monotonic within the same millisecond, so a batch generated together sorts in creation order. That is important when the UUIDs become sequential primary keys or you rely on ordering during a bulk insert. If you choose v4 instead, the values are independently random and carry no order, which is the correct behaviour for opaque tokens.