Interval timer that beeps when it should
Free, no login, keeps your screen on, works offline. Pick a preset or set your own work and rest.
Space start/pause R reset Esc stop
Settings
30 sec work, 15 sec rest, 8 rounds. 5 min 55 sec total. Starts with a 10 sec get-ready count.
Presets
01
Every timer, one place
- Interval timer Work, rest, rounds, sets. Presets for HIIT, boxing, run/walk and "beep every 10 minutes".
- Countdown timer One number, one beep. Presets from 1 to 60 minutes, or type your own.
- Stopwatch Laps with split and total. Fastest and slowest marked.
- Tabata timer 20 on, 10 off, 8 rounds. The real one, or edit it.
- EMOM timer Every minute on the minute. Or every 90 seconds, or every two.
- Pomodoro timer 25/5 with a long break every four. Session count survives reloads.
02
Why this one
Most timer sites drift. They count ticks, the tab gets throttled, and your 20 minute EMOM ends 40 seconds late. This one reads the clock. Sleep the phone, switch apps, come back: it is on the right second and plays anything you missed.
- Keeps the screen on while running, using the Wake Lock API with a fallback for older phones.
- Beeps are generated on the spot, so nothing to download and nothing to buffer.
- Works offline after the first visit. Airplane mode is fine.
- No account. Presets and history stay in your browser. There is a button to wipe them.
- Space to start, R to reset, Esc to stop. Fullscreen digits you can read from across the room.
- Open source under the MIT licence. Read the engine, run it yourself, or send a fix on GitHub .
03
Beep every N minutes
A surprising number of people want a 30 minute timer that beeps every 10 minutes: for study blocks, sauna rounds, tattoo sessions, saline soaks, checking the oven. That is an interval timer with no rest. The first preset above does exactly that, and each cadence has its own page with the timer already set.
04
Timers by what you are doing
The same countdown, set up and written for a specific job.
Questions people ask
- Is Go Intervals free?
- Yes. No account, no ads, no premium tier. Presets and history live in your browser, not on a server.
- Does the timer keep going if my phone screen locks?
- The timer works from timestamps, so when you come back it is on the right second and plays a catch-up tone for anything you missed. While the page is open it asks the phone to keep the screen on, so it should not lock in the first place.
- Does it work offline?
- After your first visit, yes. The pages are cached by a service worker so the timers load with no connection.
- What are the keyboard shortcuts?
- Space starts and pauses. R resets. L records a lap on the stopwatch. Esc pauses a running timer and leaves fullscreen.
- How do I delete my saved presets and history?
- Use "Clear my data" on the About page. It removes everything this site stored in your browser.