IntervalTimers.com
A free interval timer for HIIT, Tabata, EMOM and anything else on a clock — build it, run it fullscreen, share the link.
Every gym has the same scene at six in the morning: a phone propped against a water bottle, screen dimmed to save battery, and nobody more than a metre away can read the number. The timer app on it wanted an account, a subscription, and a notifications permission before it would agree to count to thirty.
IntervalTimers.com is the version without any of that. Build a timer, press start, put the screen somewhere the room can see it.
Building one
A timer is an ordered list of rounds, each with a name and a length, and there's no cap on how many you add. A warm-up, eight work/rest pairs, and a stretch at the end is just eleven rounds in a row. The whole sequence then repeats for as many sets as the session calls for.
That second part is what most simple timers get wrong. They'll loop a single interval forever, but they won't loop a structure — so anything with more shape than "thirty on, fifteen off" ends up being counted by hand.
Naming the rounds is what makes it readable mid-workout. "Station 3 — kettlebell swings" on the screen beats a bare countdown at the point where you've stopped being able to remember what comes next.
Running it
Fullscreen mode is the actual product. Digits big enough to read from across the room, audio cues on every transition so you don't have to watch it, and the screen stays awake for the duration — no waking a dark phone with a sweaty thumb to find out how long is left.
Templates
Interval training has a handful of established formats and there's no reason to make anyone rebuild them from memory. Eighteen templates cover six of them — HIIT, Tabata, AMRAP, EMOM, circuit, and meditation — each with a short explanation of what the format is actually for and three variations underneath it.
Classic Tabata is there in its real form: twenty seconds on, ten off, eight rounds, four minutes. So is a beginner HIIT at 20/40 for the people who would quit halfway through the advanced one, a 45/15 circuit for stations, EMOMs at ten and twenty minutes, and meditation timers that transition gently instead of buzzing.
Every template opens as a starting point rather than a fixed thing. Use one as-is, or edit it first.
Links instead of accounts
Every timer gets a URL, which is the saving story and the sharing story at once: send it to a training partner, bookmark it for next week, write it on the whiteboard. Nothing needs an account on either end.
Signing in only adds a place to keep them all together. The most recent public timers show up in a gallery on the home page, and that list is the most honest description of what the thing gets used for — in among the textbook Tabatas there's a "Nickels and dimes" running a hundred sets, and somebody's "Summer Practice" at thirty rounds.
Free
No account, no paid tier, and nothing counting down beside your rounds trying to sell you something. There's a tip jar for anyone who insists.