Reaction Timer

Play Reaction Timer free online. Wait for GO, then react. Five trials to find your rhythm.

Test your reflexes with five randomly delayed visual signals. See every reaction time, your fastest trial and your average, then try to beat your saved score. False starts cost points; patience counts as much as speed.

  • Category: Casual
  • Difficulty: easy
  • Players: 1 player
  • Typical game: about 1 minutes
  • Works on: desktop, phones and tablets

How to play Reaction Timer

Objective: React to the GO signal as quickly as you can across five trials.

  1. Press the large pad to start a trial. Wait while the pad says WAIT.
  2. When it changes to GO, press immediately. Your reaction time appears in milliseconds.
  3. Start the next trial when ready. Complete five valid reactions for your final score.
  4. Pressing before GO costs 100 points and restarts that trial.
  5. Pausing or leaving the tab cancels the current trial without a penalty. Completed trials are kept until you restart or leave the game.

Scoring

Score = 1,000 minus your average reaction time in milliseconds, minus 100 for each false start. The minimum score is zero. Higher scores are better.

Difficulty levels

Every difficulty preference uses the same five-trial rules. The signal delay is randomized on each attempt.

Tips

  • Focus on the GO label as well as the color.
  • Use the same device and input method when comparing personal scores.

Controls

Keyboard

  • Tab to the reaction pad, then press Space or Enter
  • P to pause; R to restart

Mouse

  • Press the large reaction pad

Touch

  • Tap the large reaction pad

Reaction Timer achievements

  • Quick Start – Complete five reaction trials.
  • Steady Nerves – Finish a round without a false start.
  • Lightning Reflexes – Average 300 ms or less with no false starts.

Frequently asked questions

Is Reaction Timer free to play?

Yes. Reaction Timer is completely free on GamesPlayLand, with no download, no sign-up and no purchases.

How do you play Reaction Timer?

React to the GO signal as quickly as you can across five trials. Press the large pad to start a trial. Wait while the pad says WAIT. When it changes to GO, press immediately. Your reaction time appears in milliseconds.

Can I play Reaction Timer on my phone?

Yes. Reaction Timer works in mobile browsers on phones and tablets, with no app to install. Tap the large reaction pad.

Does Reaction Timer save my high score?

Yes. Your personal best, statistics and achievements for Reaction Timer are saved in your browser automatically.

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