Free online class timetable maker

Many free online timetable makers hand you a blank grid and leave the placing to you. This one does the placing: no period ever holds two lessons for the class, and the same subject rarely repeats on one day unless you allow double lessons. It works from a randomized pass ordered by your preferences, then repairs the layout until every lesson fits or the grid is full.

Because it works from a seed, the same inputs always produce the same timetable. Regenerate changes the seed, so you get a different valid arrangement each time without editing anything.

A class needing Maths and English at five lessons each, Science at four, History at three, and PE and Art at two totals twenty-one lessons a week. In a five-day week of six periods, thirty slots, that leaves nine free.

Mark Maths, English, and Science as earlier subjects, and Maths to avoid the last period. The generator places the academic subjects in the morning, spreads each subject across different days, and leaves free periods where the week is not full. Regenerate and the same rules produce a fresh layout.

This generator schedules one class in isolation. It does not share teachers or rooms across classes, resolve conflicts between year groups, or weigh competing priorities.

Real schools schedule every class at once, against shared teachers, rooms, and equipment. That is a much harder problem, and it is what Smootables is built to solve.