Utilities
Free Tools
Client-side utilities that respect your data. No accounts. No tracking. Everything runs in your browser.
9 tools available
Developer · Utilities
Developer Tools Suite
30 client-side tools in one page: JSON, JWT, Base64, regex tester, cron parser, diff checker, markdown preview, code beautifier, CSV↔JSON, chmod, CIDR, password generator, favicon maker, and more.
¥Finance · Calculators
Financial Calculators
9 client-side calculators: compound interest, loan/mortgage, debt payoff (avalanche vs snowball), savings goal, ROI, freelancer tax, FIRE (financial independence), side hustle profit, and crypto DCA simulator.
☢Analysis · AI-Powered
Manipulation Detector
Paste any text and get an instant analysis of persuasion tactics, emotional manipulation, logical fallacies, and deceptive language patterns. See through the noise.
⚄Cryptography · Randomness
Entropy Visualizer
Generate true random numbers from device entropy — mouse movement, sensors, and cryptographic sources. Watch randomness form in real time. Bank-grade HMAC-DRBG.
⚒Construction · Calculators
Construction Calculators
Concrete volume, paint coverage, flooring area, lumber estimator, fence post spacing, and wallpaper calculator. Blueprint your next project with precision.
☉Wellness · Breathwork
Breathwork Timer
Guided breathing exercises with hypnotic visualizations. Box Breathing, 4-7-8, Wim Hof, and Nadi Shodhana. No app install needed. Just breathe.
✲Developer · Regex
AI Regex Architect
Describe what you want to match in plain English and get the exact regex. 35+ built-in patterns, live test area, match highlighting, and a cheat sheet. Terminal aesthetic.
✦Developer · Reference
The Nexus — API Directory
Curated directory of 50+ public APIs across AI, data intelligence, government transparency, payments, and more. Categorized, searchable, with docs links and auth info.
♫Music · Rhythm
Polyrhythm Metronome
Visual metronome for complex time signatures. Two independent rhythm layers with circular visualization, accent patterns, tap tempo, and presets for Hemiola, Afro-Cuban, Balkan, and more.