Protocol Timers
Interval timers for the protocols people actually train: Tabata's 20/10, EMOM's minute rounds, AMRAP countdowns, HIIT 30/10, boxing rounds, silent meditation sits, box breathing, and a two-player chess clock. Every timer runs entirely in your browser — no signup, no accounts, works offline.
Tabata Timer
Free Tabata timer: 20 seconds all-out work, 10 seconds rest, 8 rounds — the classic 4-minute protocol. Editable rounds and intervals, audio cues, runs offline in your browser.
EMOM Timer
Free EMOM timer (every minute on the minute): 60-second rounds with a beep at each minute mark. Set rounds, work and rest within each minute. Audio cues, runs in your browser.
AMRAP Timer
Free AMRAP timer (as many rounds as possible): set a countdown from 5 to 60 minutes and count your rounds. Runs offline, beep at time-up, no signup.
HIIT Timer (30/10)
Free HIIT interval timer: the popular 30/10 split — 30 seconds work, 10 seconds transition, 10 rounds. Fully editable work/rest/rounds with audio cues. No signup, runs offline.
Boxing Round Timer
Free boxing round timer: classic 3-minute rounds with 1-minute rest, 12 rounds. Editable for 2/3-minute rounds and amateur formats. Bell-style audio cue, runs in your browser.
Meditation Timer
Free meditation timer: set 5 to 60 minutes, one soft bell at start and end. No music, no guidance — just a clean silent countdown with a completion chime. Runs offline.
Box Breathing Timer
Free box breathing timer: 4-4-4-4 second cycles (inhale-hold-exhale-hold) for 5 minutes, editable. Soft audio cues guide each phase. Used for calm focus; runs in your browser.
Chess Clock
Free online chess clock: two independent countdowns with tap-to-switch. Preset time controls (bullet 1+0, blitz 3+2, 5+0, rapid 10+0) or set custom minutes. Runs offline in your browser.
Interval timing is a training aid, not coaching advice. Warm up, scale work/rest to your fitness level, and stop if you feel pain, dizziness, or shortness of breath. Verify any clinically relevant exercise plan with a qualified professional.