Generate UUIDs the Easy Way

UUIDs give you globally unique identifiers without a central database handing out numbers. That makes them ideal for distributed systems, offline record creation, and anything where two machines might generate IDs at the same time and must never clash.

Different versions serve different needs: v4 is purely random, v1 is time-based, and v7 combines a timestamp with randomness for sortable keys. A good generator lets you pick the version and batch quantity you need without pulling in a library.

Sequential integer IDs leak information too. They tell anyone watching how many records you have and let people guess the next value in a URL. A UUID exposes none of that, which makes it a safer public identifier for objects in an API or a shareable link.

Get unique IDs in three steps:

• Pick the version you need: v4, v1, or v7.
• Set the quantity for single or batch generation.
• Copy or download your UUIDs.

Open the Online UUID Generator and generate the IDs your project needs.

For a big batch, the download option saves you from copying line by line. Grab a few hundred as a file and drop them straight into a seed script or a fixture, ready to import without any extra formatting.

Reach for v4 when you just need a random, collision-proof ID and do not care about ordering. It is the sensible default for most application objects, session tokens, and general-purpose keys.

Choose v7 when you want IDs that sort by creation time, which keeps database indexes tidy and makes recent records easy to find. v1 remains useful for systems that already expect time-based identifiers. Matching the version to the job keeps your data model clean from the start.

The batch feature earns its keep here too. When you are seeding a test database or mocking out an API response, you rarely need just one ID. Generate a few hundred at once, download the list, and drop them straight into your fixtures without writing a throwaway script.

• Multiple versions: v4, v1, and v7 supported.
• Batch generation: create many IDs at once.
• Formatting options: configure output to fit your code.
• Private: generated locally in your browser.
• Free and unlimited.

Which version should I use? v4 for general random IDs, v7 when you want time-sortable keys, v1 for time-based needs.

Can I generate hundreds at once? Yes, set the batch quantity and copy or download the list.

Are the UUIDs stored? No, they are generated in your browser.

Are they truly unique? The odds of a v4 collision are astronomically small, so for practical purposes each one is unique across your systems.