🏋️ Workout Timer

A workout timer supporting HIIT, Tabata, and custom intervals. Color-coded work/rest displays with voice alerts and fullscreen mode to support your training.

Prep
5
Round 0 / 0
Elapsed: 00:00

Workout Info

mode (musical mode, mode of probability distribution, state of physical system)
HIIT
Total Rounds
8
Work Time
20s
Total Time
4:00

Usage and Application Examples

  • Start training easily with HIIT and Tabata presets
  • Customize work time, rest time, and rounds in custom mode
  • Check the current phase at a glance by screen color (Prep=Blue, Work=Green, Rest=Red)
  • Don't miss phase transitions with audio alerts
  • Fullscreen display makes it easy to see on your smartphone

What is Workout Timer?

A workout timer designed specifically for interval training formats like HIIT (High-Intensity Interval Training) and Tabata. It visually distinguishes work periods from rest periods with color coding, includes voice alerts to keep you focused without checking the screen, and supports fullscreen mode for gym use.

How to Use

Set your desired work duration (e.g., 40 seconds) and rest duration (e.g., 20 seconds), then input the number of rounds. Press start and the timer counts down with color changes for each phase. Voice announcements alert you when transitioning between work and rest periods. Fullscreen mode maximizes readability from a distance, allowing you to focus entirely on your training intensity.

Use Cases

• Training a 30-second sprint circuit: Set 30s work / 30s rest × 12 rounds for a quick cardio burst
• Tabata protocol: Standard 20s work / 10s rest × 8 rounds per exercise
• Recovery tracking: Use longer rest periods (60s) between heavy strength sets to monitor fatigue
• Group fitness: Fullscreen display visible to an entire class or training group

Tips & Insights

Interval training effectiveness relies on consistent pacing—audio cues eliminate the distraction of clock-watching. The 1:1 work-to-rest ratio (like 40:40) builds capacity, while 2:1 ratios (40:20) increase intensity. Adjust intervals based on exercise difficulty: explosive movements like burpees need longer rest, while steady cardio tolerates shorter recovery windows.

Frequently Asked Questions

What's the difference between HIIT and Tabata?

HIIT is a general term for high-intensity interval training where you can freely set the work-to-rest ratio. Tabata is a specific protocol of 20 seconds of work followed by 10 seconds of rest, repeated for 8 sets (4 minutes total), with scientifically proven effectiveness.

What should I do if there's no sound?

Due to browser autoplay policies, you need to interact with the page first. Press the start button to enable audio. Also make sure your volume is turned on.

What settings are available in custom mode?

You can freely set work time (5-300 seconds), rest time (5-300 seconds), and number of rounds (1-99). Train according to your fitness level.

How do I use fullscreen mode?

Press the fullscreen button to display the timer across the entire screen. This makes it easier to see during workouts on smartphones and tablets. Press ESC to exit fullscreen.

What is the preparation time (shown in blue)?

There's a 5-second preparation period before each workout starts. It's displayed in blue and can be used to mentally prepare and get into position.

Can I pause and resume a workout session?

Yes, you can pause at any time by clicking the pause button, and resume when ready. Your progress is maintained, so you won't lose track of which interval you're on or your accumulated time.

What's the maximum duration for a custom workout?

You can create custom workouts with any number of rounds and intervals. However, for the best performance and accuracy, keep total workout time under 2 hours.

Does the app work without an internet connection?

Yes, the workout timer is fully functional offline once it loads in your browser. All sounds and timing functions work without internet connectivity.

Can I use this with headphones if I have no speakers?

Absolutely! The voice alerts and sound notifications will play through your headphones or connected audio devices. Make sure your volume is set appropriately to hear the alerts.

What's the difference between the work period (red) and rest period (blue) colors?

Red indicates active work time when you should be exercising intensely, while blue shows rest/recovery time to catch your breath between intervals.

Can I save multiple custom workout routines?

Currently, the app remembers your last custom configuration in browser storage. For saving multiple routines, you'd need to document your preferred settings and re-enter them when needed.