What happens if two lessons want the same slot?
Higher-priority rows are placed first. If auto-pack is on, the lower-priority row can move to another open slot; otherwise it is logged as blocked.
School schedule
Set the week start, slot length, and placement rules.
Timetable Generator
Arrange lessons, rooms, and teachers into a weekly timetable using priorities, day preferences, and slot preferences.
What it handles
Turn real constraints into a workable timetable
Priority-first
Schedule the important lessons first
Higher-priority lessons are placed before lower-priority ones, so scarce slots go where they matter most.
Fixed rules
Use day and slot preferences
Pin a lesson to a day, a slot, or a range of slots to keep fixed classes stable.
Conflict log
See what moved or stayed out
Review collisions and unplaced rows immediately after generation.
Local settings
Keep the setup in your browser
Your week start and slot length can stay on this device when remember settings is enabled.
Quick start
Build a schedule in four steps
- Add one row for each lesson, meeting, or activity.
- Enter day and slot preferences for classes that must stay in a fixed place.
- Choose the week start and slot length before generating.
- Review the collision log and the unplaced list after generation.
Examples
Where this helps
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A small school timetable with homeroom, specialist teachers, and fixed room assignments.
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A cram-school schedule with repeated sessions and room constraints.
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A club or workshop schedule with recurring weekly blocks.
FAQ
Common questions
Can I leave the preference fields blank?
Yes. Blank preference fields give the generator more freedom to place rows automatically.
Are my settings saved?
Only when remember settings is enabled. In that case the current settings stay in this browser.
Can I export the result?
Yes. You can copy the report text or export the timetable as CSV.
Notes
Before you rely on the result
- The generator does not know teacher availability unless you type it into the preference fields.
- Very dense timetables are easier to fit when you reduce the slot count or loosen some constraints.
- Remember settings stores values only in the current browser.