All Reaction Games
Four reaction games to measure, train, and compete on reaction speed. All the reaction games here are free and run in your browser.
Solo Reaction Games
These reaction games all measure the same thing: how fast you respond to a visual signal. Screen changes color, you click, and the gap between those two moments is your reaction time. There's a one-click test that hands you a number in about ten seconds, a five-round version that averages your trials into a score you can actually defend, and an endless streak mode that keeps going until your attention gives out. All three use the same randomized delay, so guessing never pays off, and all three save your best result right in your browser so you can watch it move.
Reaction Time Game
Click the instant the screen turns green. Unlimited plays, instant score and rating.
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Reaction Time Test
Five measured rounds averaged into one score, with a per-round breakdown and percentile.
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Reaction Speed Test
Endless streak mode. Hit every green in a row — one miss ends the run.
Play →Multiplayer Reaction Games
Solo reaction games tell you how fast you are. Multiplayer tells you whether that speed holds up with someone racing you for the same signal. The 1v1 battle splits one screen down the middle, gives each player a key and a side, and hands the point to whoever hits first after green — jump early and your opponent gets it for free. The whole match runs locally, so there's no lag and nobody gets a connection advantage; you're both on the same clock on the same machine. It's the quickest way to settle an argument about whose reflexes are better, and it almost always ends with the more patient player winning, not the faster one.
Training Guides
Playing reaction games tells you where you are. Getting better at them is a separate project. The training guide walks through what the evidence actually backs up — five exercises built around the games on this site, a four-week plan for working through them, typical reaction times by age, and a straight answer about the ceiling you're up against. Short version: simple reaction time has a hard floor around 100 to 120 milliseconds that nerve conduction won't let you beat, most people are nowhere near their own floor, and sleep moves your number more than any drill ever will.
More Reaction Games Coming Soon
Three more reaction games in the works. Audio reaction tests swap the color change for a sound, and people usually come in 30 to 40 milliseconds faster on those — sound just takes a shorter path through your brain than sight does. Choice reaction tests throw in a decision, where the right response depends on which color shows up, and that decision reliably costs you 100 milliseconds or more. That's why they end up closer to real driving than a simple test. And online rooms will finally let you battle from your own device instead of sharing a screen.
Audio Reaction Test
React to a sound instead of a color change.
Coming soonChoice Reaction Test
The right response depends on which color appears.
Coming soonOnline Multiplayer Rooms
Battle from your own device against a friend on theirs.
Coming soonWhich Reaction Games Should You Play?
If you just want a number, play the reaction time game — one click and you have a score with a rating attached. If you want a number you can defend, the five-round test averages five trials so a single lucky attempt cannot flatter you, and it estimates where you sit against the adult population.
If your problem is attention rather than speed, the speed streak mode keeps signals coming until you miss one, which is a much better model of real-world demands like driving. And when the argument about whose reflexes are better needs settling, the 1v1 battle decides it in about two minutes.
More modes are coming: audio reaction tests, choice reaction tests where the correct response depends on which color appears, and live cross-device multiplayer rooms.
Frequently Asked Questions
Which of the reaction games should I start with?
Start with the Reaction Time Game on the homepage — one click and you've got a number in about ten seconds. Once you want a score you can actually trust, move on to the five-round test.
Are all the reaction games free?
Yes — every one of them, with no account, no download, and no cap on how much you play. Your scores just live in your own browser.
Do I need an account to save my reaction games scores?
No. Your best score, running average, and best streak are saved in your browser's local storage automatically. Clearing your browser data resets them, and nothing is ever uploaded.
Do these reaction games work on mobile?
Yes. Every game supports tapping as well as clicking and adapts to phone-sized screens. Expect slightly slower absolute times on a touchscreen, since touch input adds latency that a mouse does not.
Are more reaction games coming?
Yes — audio reaction tests, color-choice reaction tests, and live cross-device multiplayer rooms are all on the roadmap.
What counts as a good score?
On the browser-based tests here, the baseline is around 273ms. Lab equipment reports about 250ms for the same task, and that gap is your screen and mouse, not a faster group of people. Under 250ms puts you comfortably above average, under 200ms is where pro esports players live, and under 150ms is fast enough that you should probably double-check you were reacting and not guessing.
Can I play these with friends?
Yep. The 1v1 multiplayer battle puts you both on one screen with a key each, and the point goes to whoever hits first after the panel turns green. Every other game saves a shareable result too, so you can just text someone your number and dare them to beat it.
Which game actually makes me better, not just measured?
The streak mode, because it trains the part that usually breaks. Most people's raw speed is already close to their ceiling — what they're missing is the ability to stay locked in through a long stretch where nothing happens. Run it alongside the training guide, which sorts out which habits genuinely move your number and which ones just feel productive.
Do reaction games really improve your reflexes?
Somewhat, and pretty specifically. Practice reliably improves your score on the exact task you practice, mostly by tightening the gap between your fastest and slowest attempt rather than lowering your floor. It doesn't transfer much to unrelated stuff, so think of these as measurement and attention tools, not an upgrade to your nervous system.
Why is my score worse here than on other sites?
Every site measures a little differently, and none of them can see the moment a pixel actually changes. Some start the clock at a different point, some ignore early clicks instead of making you redo the round, and refresh rate alone can swing things by 15ms. Compare yourself against your own history on the same device — not across sites.