Guess the number 1–100 with hotter/colder hints and attempt tracking. Five tries is sharp play — free, local, no signup, learn binary search by feel.
Content reviewed October 2026 · About Toolzum
Play hangman with categories and difficulty levels — guess letters before parts run out. Six wrong guesses and it's over — free, local, no signup.
Run JavaScript speed benchmarks across five workloads with ops/sec scores. Prove which device runs faster — local measurement, free, no signup.
Generate arithmetic, geometric, and custom number sequences with sums. Fill spreadsheets and test series — free, local, no signup.
Convert numbers between binary, octal, decimal, and hex with bitwise views. Read 0xFF as 255 instantly — local math, free, no signup.
Translate text to Morse code and decode Morse back — with timing-accurate playback. Learn SOS (···---···) properly — local processing, free, no signup.
Binary search: guess 50, then halve the remaining range each time — 1–100 cracks in 7 guesses maximum. Random guessing averages far worse.
Each guess reports too-high or too-low, narrowing the window visibly. Five attempts or fewer marks sharp play.
Yes — new random number every round with attempt history kept per session. Race friends for fewest guesses.
No — the game runs entirely in your browser. Nothing leaves your device.
Rock Paper Scissors
Play rock-paper-scissors against the computer with win/loss/tie scoreboard. Settle any debate in three throws — free, local, no signup.
Hangman Game
Play hangman with categories and difficulty levels — guess letters before parts run out. Six wrong guesses and it's over — free, local, no signup.