Reaction time test
How fast you react when a signal appears.
A little curiosity goes a long way
Free brain tests for your website or class
Give your readers something to try. Bring a moment of discovery to a blog post, a classroom lesson or a community website.
Choose a testFully freeNo signupNo ads
Your page. A moment of discovery.
Every free test has an embed version. It uses the same game and scoring as Helibrain, in a compact frame that fits your page.
- 1
Pick something to explore
Try a reaction, memory, language or reasoning test. Open any test page and find “Embed this test” below the game.
- 2
Copy, paste, publish
Preview the game and copy its code into your site’s HTML block. Keep the normal text credit link directly below the frame.
- 3
Let curiosity take over
Readers play right on your page. Their score links to Helibrain for more context and a new run to compare.
A few good places to start
Open a live preview, then copy the code. Every test in the collection is free to embed.
Stroop test
How much a word gets in the way when you name its ink color.
Vocabulary test
How many English words you know, with a range and player comparisons.
Explore all 43 free tests
- IQ test
- Reaction time test
- Attention span test
- Go/no-go test
- N-back test
- Creativity test
- Matrix reasoning test
- Number memory test
- Stroop test
- Visual memory test
- Sequence memory test
- Chimp test
- Verbal memory test
- Math speed test
- Mental rotation test
- Trail making test
- Processing speed test
- Guess 2/3 of the average
- Balloon risk game
- Four-deck card game
- Tower of London test
- Sense of direction test
- Typing speed test
- Click speed test
- Aim trainer
- Big Five personality test
- Aphantasia test
- Color perception test
- Tone deaf test
- Face memory test
- Emotion recognition test
- Draw a perfect circle
- Time perception test
- Daily logic puzzle
- Reading speed test
- Vocabulary test
- Task switching test
- Daily general knowledge quiz
- Three-word riddles
- Social shapes challenge
- Decision traps
- Brain-health habits check
- Stress resilience profile
Good to know
Is it really free?
Yes. There is no charge, paywall, signup requirement or advertising in the embedded tests.
What about privacy and cookies?
The same test privacy policy applies. We store test results and interaction signals to score tests and understand automated play. An embed records the referring domain, never its full URL. We do not place our tracking cookies on your host page. Embedded tests work when third-party cookies or browser storage are blocked; account login and save-progress claims are not offered inside the frame.
Read the privacy policyWhere do results go?
A score appears inside the frame. Readers can open it on Helibrain in a new tab to read more and compare another attempt. This uses the existing share link, not an account or a saved-progress cookie. These tests are for curiosity and learning, not diagnosis.
Will it fit on a phone?
Yes. The frame adapts from 300 pixels wide and follows the color scheme of its host. The copied code has a fixed height with scrolling. Include the optional resize script to let its height adjust as the game changes. Your website must allow iframes.
Can I embed a translated test?
Yes. Open the test in your preferred language and use its embed button. The code preserves that language. Availability follows the translated tests on Helibrain.
What are the rules for using it?
Keep the game, Helibrain credit and visible text link intact. Do not alter, rebrand or sell the test, or claim it is your own. You may use it in a class, blog or website for free.