The timer library
Everyday online timers
Pick a focused countdown, an open-ended count-up, a lap-friendly stopwatch, or a timer built for a room full of people. Every tool starts in your browser and works without registration.
Custom Countdown Timer
Set hours, minutes, and seconds for a precise countdown with sound alerts, presets, and full-screen mode.
Count-Up Timer
Track elapsed time from zero or a starting duration, with an optional target and progress indicator.
Stopwatch
Time events with hundredths-of-a-second precision, record laps, and export your lap data as CSV.
Full-Screen Timer
A distraction-free countdown or count-up timer with large digits, progress bar, and warning colors.
Multiple Timers
Run several independent countdown timers at once, each with its own name, controls, and completion alert.
Repeating Timer
Cycle through work and rest intervals with configurable duration, rest, cycle count, and phase alerts.
Classroom Timer
A large countdown timer for projection in class, with activity labels, presets, warning threshold, and full-screen mode.
Visual Classroom Timer
Show remaining time as a shrinking disk or progress bar with high-contrast options, full-screen mode, and reduced-motion support.
Classroom Transition Timer
Build an ordered sequence of timed activities with auto or manual advance, pause, skip, and optional step sounds.
ADHD Visual Timer
A calm, single-task timer with optional focus presets, preparation period, break, and distraction-reduced display.
Sensory Break Timer
A quiet countdown with a gentle visual indicator, sound off by default, and a large end-break control.
Study Timer
Plan study and break sessions with editable schedules, session counts, phase tracking, and background recovery.
Interval Timer
Configure preparation, work, rest, cooldown, and rounds for high-intensity interval training with full-screen mode and sound cues.
EMOM Timer
Start a new interval every minute with configurable rounds, optional custom intervals, activity labels, and sound at boundaries.
AMRAP Timer
Count down a workout window while manually tracking completed rounds and partial repetitions with undo and a completion summary.
Boxing Timer
Configurable boxing round timer with preparation, round and rest durations, warning before round end, and optional sounds.
Martial Arts Round Timer
Build editable training sequences with named drills, variable durations, optional rest steps, and sequence repetition.
Which timer should I choose?
| Need | Choose |
|---|---|
| A set amount of time | Countdown |
| Track time as it passes | Count-up |
| Splits and laps | Stopwatch |
| A visible room display | Full-screen |
| Several tasks at once | Multiple timers |
| Work and rest intervals | Repeating timer |