Free tool · No sign-up · No server

When are we all free?

Mark the hours you have class, share one link with your friends, and instantly see the slots when everyone is free. There's no login and no backend — the whole group's timetable travels inside the link. Or use Solo mode to find the best free blocks around your own classes for a part-time job.

Everyone marks their busy classes on the same grid via a shared link — the tool highlights the hours you're all free.

Day starts

Day ends

Include Sunday

Your busy hours — tap every cell where you have a class:

Busy (you have class) Tap a cell to toggle · scroll sideways for later hours

No one added yet. Mark your busy hours above, then hit Add me to the group.

0common free hrs

Keep this in sync automatically. AttendFlow already knows everyone's timetable — your group's free time stays live every week without re-marking a grid.

Get AttendFlow — free Free plan · import your timetable once · works offline

Availability heat map

Green = everyone free. Redder = more people in class.

All free Some busy Everyone busy Number in a cell = people in class then

Heads up: this tool plans around class hours you type in — it doesn't know about labs that run late, commute time, or one-off changes. Confirm the final plan with your group before you commit. Times are shown for whatever timezone your friends read the link in; everyone should use the same clock.

How the group free-time finder works

Finding a slot when five people are all free normally means five group-chat messages and a lot of "no, I have a lab then". This does it visually, and the clever part is that there's no server — everyone's grid is packed into the share link itself.

1Set the window to search (say 8 AM–6 PM) and turn on Sunday if your group meets on weekends.
2Tap every hour you have a class so it turns solid — that's your busy time.
3Type your name, hit Add me to the group, then Copy share link. Your timetable is now encoded after the # in the URL.
4Send the link. Each friend opens it, sees who's already in, marks their own classes and saves — the link grows to carry everyone.
5The grid highlights every hour nobody is busy, and lists your common free slots.

Worked example. Searching 8 AM–6 PM. Aisha has class Wed 3–4 PM. Rohan has class Wed 4–5 PM. On Wednesday the only busy hours are 3–4 (Aisha) and 4–5 (Rohan), so the common-free block is Wed 8 AM–3 PM plus Wed 5–6 PM. Add a third friend busy 8–12 and the morning block shrinks to fit — the tool recomputes instantly.

Solo mode: fit a part-time job around your classes

Switch to Solo and it drops the group and just analyses your own timetable. Mark your classes and it ranks your longest free blocks across the week — exactly what you need when you're pitching your availability to a café, a tuition gig or an internship.

Worked example. Your classes end at 2 PM on Tuesday. The tool reports Tue 2–6 PM (4 hrs) as your longest block, tallies your total free hours in the window, and flags the evenings that repeat free across the week as a good recurring shift slot.

It's the same grid and the same share link — so you can send your availability to a manager without them installing anything either.

No accounts, no server, nothing stored

Everything runs in your browser. When you copy the link, all the grids are compressed into the part of the URL after the # (the fragment), which browsers never even send to a web server. Decode happens locally when a friend opens it. If you don't share the link, nobody can see your timetable — there's no database to leak.

The trade-off: a link only ever holds the people who were added when it was copied. If two friends edit different copies at the same time, whoever copies last wins. For a group whose timetable should just stay in sync automatically, that's what the app is for. More on timetables and attendance on the AttendFlow blog →

Frequently asked questions

How do I find a time when everyone in my group is free?

Each person marks the hours they have class on the shared grid. The tool overlaps all the timetables and highlights every hour where nobody is busy. The result is your common free time, such as "Wed 3–4 PM and Fri 11 AM–12 PM".

Does everyone need to sign up or install anything to use the link?

No. There's no login and no account. A friend just opens the link in any browser, sees who's already been added, marks their own busy hours and saves. Installing the free AttendFlow app is optional and only keeps everyone's availability in sync automatically afterwards.

Is my timetable stored on a server?

No. There's no backend. Everyone's grid is encoded directly into the share link (after the # in the URL) and decoded in your browser. Nothing is uploaded, so if you don't share the link, nobody else can see your timetable.

Can I use this to find free time around my classes for a part-time job?

Yes. Switch to Solo mode, mark your classes, and the tool ranks your longest free blocks across the week — for example "Tue 2–6 PM, 11 free hours a week" — so you can see which shifts fit around your timetable.

Is this group free-time finder free?

Yes — completely free, runs in your browser, no sign-up. To keep your group's availability synced automatically every week instead of re-marking a grid, install the free AttendFlow app.

Stop re-marking a grid every week

AttendFlow already holds your timetable, attendance and exams. Your group's free time just stays in sync — no link to re-copy, no one left off.

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