We Built a Free Online Boxing Round Timer. Here's What It Does.

If you have ever pulled up a boxing timer online and immediately closed it because of ads, broken audio, or a modal asking you to sign up, you know the problem. There are a lot of free boxing timers on the internet. Most of them are not actually good. So we built one.

Our brand new free online boxing round timer runs entirely in your browser. No download, no account, no ads covering the screen mid-round. Open it on your phone, tablet, or laptop, configure your session, and start training.

What it does

The core is simple: it counts down your rounds, plays a bell between phases, and keeps you moving without you having to watch a clock.

Beyond that:

• Sport presets. Select Pro Boxing, MMA, Amateur Boxing, Muay Thai, Kickboxing, Taekwondo, or Karate and the round time, rest time, and round count are set automatically. If you want to run custom intervals, pick Custom and dial in whatever you need. Your settings save automatically so next time you open it, everything is where you left it.

• Real bell sounds. There is an actual boxing bell, not a generated beep. You can choose between normal and loud, which matters if you are training with music on or working out in a noisy gym setup.

• Warmup countdown. Set a warmup period before the first bell so you have time to get loose. 10 seconds before each round ends, a warning double-beep plays, same as a trainer calling out “ten seconds” at the gym.

• Round progress ring. The full-screen timer view shows a ring that fills as each round progresses, dots at the top for each round completed, and a large phase label so you can read it from across the room.

How to use it

Set your rounds, round time, and rest time. Pick a sport preset if it applies. Hit Start. The timer handles everything from there, warmup through the final bell.

Tap anywhere on the screen to pause. The skip buttons let you move forward or back between phases if you need to. The gear icon returns you to settings at any time.

That is genuinely it. There is nothing else to configure before you can start throwing punches.

What sports it covers

The timer covers boxing, MMA, Muay Thai, kickboxing, karate, taekwondo, and general HIIT or circuit training. The presets are set to the actual competition formats:

• Pro Boxing: 12 rounds, 3 minutes, 1 minute rest
• MMA: 3 rounds, 5 minutes, 1 minute rest
• Muay Thai: 5 rounds, 3 minutes, 2 minutes rest
• Amateur Boxing (Men): 3 rounds, 3 minutes, 1 minute rest
• Amateur Boxing (Women): 4 rounds, 2 minutes, 1 minute rest

If you are using it for heavy bag work or shadow boxing at home, the custom setting is usually better. Most people do 2 or 3 minute rounds with 30 to 60 seconds rest. The timer handles anything from 10-second rounds up to 10-minute rounds.

The iOS app has a timer too, and it is also free

The browser timer was built to be useful on its own. But if you want more, the Shadow Boxing App includes a full-featured round timer built into the app alongside guided shadow boxing workouts, technique tutorials, and training programs.

The in-app timer is also completely free, and it works on Apple Watch with haptic feedback between rounds so you do not have to look at your phone at all during a session.

The browser version is the fastest way to get a timer running on any device, including Android. The app is for people who want structure around the training itself, not just a clock.