Number Memory Test
Memorize a number, type it back — each level adds one more digit.
How to use Number Memory Test
Follow these steps — everything happens instantly in your browser.
- 1
Step 1. Click Start. A number appears on screen for a few seconds (longer for more digits).
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Step 2. When it disappears, type the number you saw into the input box.
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Step 3. Get it right and you advance to the next level with one more digit.
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Step 4. Make a mistake and the game ends — your best level is saved.
Why use this tool
Private by design
All processing happens locally in your browser. Open DevTools → Network and you'll see zero file uploads. Ever.
Instant
No upload wait, no queue, no server round-trip. Results appear the moment you drop a file.
Free & unlimited
No accounts, no watermarks, no daily caps. Use it as many times as you like, forever.
Works everywhere
Desktop, tablet or phone — every tool is responsive and installable as a PWA for offline use.
Frequently asked questions
Everything you might want to know about number memory test.
Memory Test (Simon)
Watch the lit-up sequence, then repeat it back — each round adds one more.
Color Vision Test
Ishihara-style plates drawn on canvas — see if your color vision is normal.
Typing Speed Test
Measure your words-per-minute with a live paragraph and accuracy tracking.
Reaction Time Test
Wait for green, click as fast as you can — measures reflexes in milliseconds.