Every tool you need,
zipped into one place.
Image converters, developer tools, calculators, and more — all free, all fast, all running in your browser.
Real questions, real answers.
Each tool is engineered using standard formulas vetted by professionals. We document the math under each tool page so you can audit the results.
"Is my dog safe right now?"
Theobromine toxicity assessment in under 10 seconds — with a clear action recommendation.
"What will this mortgage cost me?"
Real monthly payment broken down into principal and interest, plus how extra payments change everything.
"Am I at a healthy weight?"
Body mass index from the WHO-standard formula. Instant result with context — not just a number.
"What should I charge per hour?"
Accounts for taxes, downtime, and expenses using the formula accountants use.
"How much should I eat to lose weight?"
TDEE from the Mifflin-St Jeor equation — the one used by registered dietitians.
"When is my baby due?"
Due date from Naegele's rule, the same method your midwife uses. Includes milestones.
Designed for pure utility.
Every formula shown
We don't hide the math. Every tool shows the exact formula, variables, and academic citations detailing where it came from.
Zero data retention
Nothing is uploaded, tracked, or stored in remote databases. All calculations and converters execute purely in your local browser sandbox.
Expert-verified calculations
Medical index systems, financial algorithms, and scientific equations are verified against standard journals and authoritative benchmarks.
Built for speed and accuracy.
Find your tool
Search in plain English. "Convert PNG to JPG" or "How much chocolate is toxic for dogs" — we find the right utility instantly.
Enter your data
Inputs are validated instantly. Every tool outlines the mathematical formulas used so you understand the logic.
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Results are computed client-side. Download, copy to clipboard, or print. Zero account creation required.
Understand the calculations
Insightful, verified articles explaining formulas, calculations, and logic running under the hood.
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