How to use UUID Generator
Paste your input on the left, choose the options you want, and the output appears instantly on the right. Everything runs in your browser — none of your data is sent to a server.
- Paste or type your input in the
INPUTpanel - The output regenerates automatically as you type
- Use
Copyto put the result in your clipboard - Click
Sampleto load a working example
What is UUID Generator?
UUID Generator creates universally unique identifiers (UUIDs) following the RFC 4122 standard. Choose between v1 (time-based), v4 (random), or v7 (time-sortable). Generate up to 100 UUIDs at once. All UUIDs are generated locally. This tool is part of santekno's developer toolbox — a curated collection of utilities built for engineers who care about speed, privacy, and simplicity.
Common use cases
- Debugging API payloads and integration issues
- Inspecting tokens, hashes, or encoded strings during development
- Generating fixtures and sample data for tests
- Sharing readable output with teammates in code reviews
FAQ
UUID v4 is randomly generated. It has 122 bits of randomness and is the most commonly used version.
UUID v7 is time-sortable, making it better for database primary keys as it reduces index fragmentation.
UUID v4 has a collision probability of 1 in 2^122. For practical purposes, treat them as unique.
Yes. UUID v7 is recommended for database primary keys due to its time-ordered nature.
A UUID is 128 bits formatted as 8-4-4-4-12 hexadecimal characters: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.