Free Reaction Test Widgets

Put a live reaction time test, F1 start test, click speed test or brain game on your own site with one line of code. Free forever, works on phones, and every widget stays up to date automatically.

Reaction Time Test

F1 Lights Out Start

New

Five red lights, then lights out — perfect for motorsport blogs.

Preview widget

<iframe src="https://reactiontests.net/embed/lights-out" width="100%" height="600" style="border:0;border-radius:16px;max-width:720px" title="F1 Lights Out Start by ReactionLab" loading="lazy" allow="autoplay"></iframe>

Quick Draw Duel

New

A western reaction duel with fake calls. Very shareable.

Preview widget

<iframe src="https://reactiontests.net/embed/quick-draw" width="100%" height="600" style="border:0;border-radius:16px;max-width:720px" title="Quick Draw Duel by ReactionLab" loading="lazy" allow="autoplay"></iframe>

Echo Rhythm Memory

New

Tap a beat pattern back — great for music and rhythm sites.

Preview widget

<iframe src="https://reactiontests.net/embed/echo" width="100%" height="600" style="border:0;border-radius:16px;max-width:720px" title="Echo Rhythm Memory by ReactionLab" loading="lazy" allow="autoplay"></iframe>

CPS / Click Speed Test

1, 5 or 10-second clicks-per-second test for gaming sites.

Preview widget

<iframe src="https://reactiontests.net/embed/click-speed" width="100%" height="600" style="border:0;border-radius:16px;max-width:720px" title="CPS / Click Speed Test by ReactionLab" loading="lazy" allow="autoplay"></iframe>

Audio Reaction Test

React to a sound instead of a colour change.

Preview widget

<iframe src="https://reactiontests.net/embed/audio" width="100%" height="600" style="border:0;border-radius:16px;max-width:720px" title="Audio Reaction Test by ReactionLab" loading="lazy" allow="autoplay"></iframe>

Go / No-Go Test

Impulse-control reaction test — ideal for classrooms.

Preview widget

<iframe src="https://reactiontests.net/embed/gonogo" width="100%" height="600" style="border:0;border-radius:16px;max-width:720px" title="Go / No-Go Test by ReactionLab" loading="lazy" allow="autoplay"></iframe>

Aim Trainer

30-target flick test for FPS and esports communities.

Preview widget

<iframe src="https://reactiontests.net/embed/aim-trainer" width="100%" height="600" style="border:0;border-radius:16px;max-width:720px" title="Aim Trainer by ReactionLab" loading="lazy" allow="autoplay"></iframe>

Schulte Table

Classic 1–25 focus and attention drill.

Preview widget

<iframe src="https://reactiontests.net/embed/schulte" width="100%" height="600" style="border:0;border-radius:16px;max-width:720px" title="Schulte Table by ReactionLab" loading="lazy" allow="autoplay"></iframe>

Sequence Memory

Repeat a growing tile pattern — a favourite brain game.

Preview widget

<iframe src="https://reactiontests.net/embed/sequence-memory" width="100%" height="600" style="border:0;border-radius:16px;max-width:720px" title="Sequence Memory by ReactionLab" loading="lazy" allow="autoplay"></iframe>

Widget FAQ

Are the ReactionLab widgets free?

Yes. Every widget is free to embed on any website — blogs, school pages, esports communities, sports clubs and more. No account or API key needed.

How do I add a reaction test to my website?

Copy the iframe code for the widget you want and paste it into your page's HTML (in WordPress, use a Custom HTML block). It works on desktop and mobile.

Do the widgets update automatically?

Yes. The widget loads from ReactionLab, so improvements and new features appear on your site automatically.

Can I change the size?

Yes — edit the width and height values in the iframe code. We recommend at least 540 px of height.