This is a small, growing library of interactive tools built the same way we build everything else at WizusLabs: for the person using them. Each one is free, needs no account, and runs entirely on your device — the computation happens in your browser, nothing is uploaded, and there is no tracking. Where the guides explain how to play our games and the blog explains how the studio works, these are the utilities you can actually pick up and use today.
Tools by WizusLabs
Tools
Small, free, genuinely useful tools that run right here in your browser — no account, no sign-up, and nothing sent to a server.
Available tools
Daily Sudoku
A fresh Sudoku puzzle every day, generated in your browser from the date — the same grid for everyone, no account and no tracking. Check your work, and pick up where you left off.
Puzzle · Daily
Sudoku Solver
Type or paste any Sudoku and solve it step by step. It explains every deduction in plain English — naked and hidden singles, locked candidates, pairs — and flags invalid or non-unique puzzles. Runs entirely on your device, no upload.
Puzzle · Solver
Colorblind Palette & Contrast Checker
Check WCAG colour contrast ratios and simulate how a palette looks under deuteranopia, protanopia, and tritanopia. Runs entirely on your device — no upload, no tracking.
Accessibility · Design & dev