Use UUIDs, random numbers and Unix timestamps
Generate test data, control repeated draws and distinguish seconds from milliseconds.
UUID v4 provides random identifiers, the number generator provides bounded integers and the timestamp converter handles instants in time. These serve different tasks: a random identifier is not a time ordering.
Generate UUIDs for test records
Choose, for example, ten UUIDs and copy the list into your test data. Each line is a version 4 UUID. Values use the browser random generator with the correct version and variant bits.
UUID v4 does not contain a built-in creation time and does not sort records chronologically. In a real database, a random identifier does not replace a unique-key constraint.
Numbers with and without repeats
In a draw from 1 to 6, both bounds are included. Without repeats and with quantity 6, each number appears once in random order. Quantity 7 is impossible in this mode and is rejected.
With repeats, each draw is independent and a number can appear multiple times. The tool maps browser random bytes to the selected range without modulo bias. It is not a prediction model.
Choose seconds or milliseconds explicitly
Unix second 0 is the start of January 1, 1970 in UTC. A value of 1000 means 16 minutes and 40 seconds later in seconds mode, but only one second later in milliseconds mode. The tool does not guess the unit.
Date-to-Unix ISO input needs a timezone: 2026-01-01T12:00:00+03:00 equals 2026-01-01T09:00:00Z. A value without Z or an offset is rejected to avoid silently assuming a device timezone.
Use and interpret the results
Copy results or download TXT. Generating again replaces the visible list. There is no server history or account from which to recover previous lists later.
The local date display follows your device timezone and may differ from UTC. Both lines describe the same instant. For passwords, use the dedicated password generator with adjustable length and character sets.