Window modes
StandaloneTimer + controls, one screen
ControlCompact panel, pairs with Display
DisplayFull-screen clock, no controls
Two-screen setup
- Open timer.acbl.ai → Control
- Open timer.acbl.ai again → Display
- ⎘ Open in New Window
- ⛶ Enter Fullscreen (or drag to the second screen first)
- Start the session in the Control window
Both windows must be the same browser on the same computer. Standalone feeds a Display too — you can add one later.
Before a tournament
Open timer.acbl.ai once while you still have internet and wait for “✓ Ready to use offline”. After that it opens and runs with no connection at all.
Timer controls
Start a fresh roundSTART
PausePAUSE
Resume after a pauseCONTINUE
Next roundSKIP →
Add a minute+ 1m
Take off a minute− 1m
Reset current round↺ Reset
All events, freshSTART ALL
All events, pausedCONTINUE ALL
Pause everythingPAUSE ALL
Keyboard (Standalone, 1 event)
Start / continue / pauseSpace
Skip round→
+ 1 minute↑
− 1 minute↓
Reset roundR
FullscreenF
What the colors mean
RunningEvent color, counting down
Time lowOrange, last quarter
Under 1 minRed, pulsing
BreakPurple, break countdown
OvertimeRed, counting UP
Setup
Events1, 2 or 3
ACBLscore import.ACM .ACB .ACA .ACE
Breaks0, 1 or 2, placed for you
ColorsOne per event
Dark theme / chimeCheckboxes, remembered
Last setupFilled in automatically
If it gets interrupted
Refresh or closed tab: reopen within 12 hours and press Pick up where I left off. It catches up to the real time and tells you what it did.
Edit Settings: pauses everything; the green Continue Session button returns you to it. Changing a time setting removes that button.
Reporting a problem: include the faint build line at the very bottom of the page.