Memory

Sequence and working memory training

Games in this category

3

Arrow Memory Challenge Brain Games Memorize the flashing arrow sequence and repeat it. Color Sequence Memory Brain Games Simon-style: watch the color order and repeat it. Number Memory Span Brain Games Memorize the number shown and type it back.

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Convert between text encodings and data formats

Hash & Crypto13

Hashing, key generation and encryption checks

Data & Format12

Convert and beautify JSON, XML, YAML, CSV

Regex, cron, JWT, SQL and everyday dev helpers

IP, subnet, MAC and port calculations

Case, stats, dedupe and cleanup for text

QR codes, placeholders and image helpers

Percentages, temperature, dates and units

Hand-eye coordination and reaction speed

Sustained attention and rhythm control

Logic, pattern recognition and thinking games