Flash Grid

Flashgrid is a free browser-based memory training game. Numbers flash briefly on a grid — then vanish completely. Your job is to remember exactly which cell each number was in and place them back correctly.

How to play

Watch the numbers flash on the grid

When they disappear, tap each cell and enter the number you remember

Get it perfect to advance to the next tier

Two difficulty modes:

Mode 1 — All numbers appear at once. Adjustable flash timer. Choose 1 or 2 grids.

Mode 2 — Numbers appear one at a time, each vanishing before the next shows. You have a countdown to fill in all answers from memory. Unlocks after completing Mode 1 Tier 9.

9 tiers per mode — starting with just 1 number all the way up to 9.

Progression & Unlocks

Complete Mode 1 Tier 9 to unlock Mode 2

Beat Mode 1 Tier 9 with 1 grid to unlock ⚡ Speed Mode — all tiers default to 1 second, earn bonus points on every replay

Beat both Mode 1 and Mode 2 entirely to earn the Grandmaster title 🏆

Features

Earn points for perfect rounds

Bonus points for shorter flash times

Keyboard support on desktop (arrow keys, number keys, Enter to submit)

Progress saved automatically in your browser

Works on mobile and desktop