Artifacts

Estimates the token cost of an image for OpenAI vision models from its width, height and detail level.

A basic calculator built as an installable offline-capable web app with React and Redux.

Czech income tax calculator for individuals (Czech language).

Simulates Warhammer 40,000 attack dice and shows hit, wound and save probabilities as charts.

Works out which trades rebalance a portfolio while limiting taxes.

All-in-one site with 21 calculators and tools, including math, finance, graphing, conversion, password and QR.

Swiss income, wealth and capital tax estimator by municipality and marital status (German).

Converts between bits, bytes and larger data units.

Estimates return on investment from buying a home versus renting.

Estimates the savings goal and earliest age you can retire early.

Small React app that computes loan EMI and monthly interest.

Calculates RC low-pass cutoff and draws Bode magnitude and phase plots, with an audio demo.

Divides rent among roommates fairly using each person's income and room.

Financial independence planner showing when savings can fund your spending.

Open-source compound interest calculator with a growth chart.

Computes Dutch mortgage loans (Dutch interface).

Dutch mortgage tool: monthly payments, extra repayments and buy-versus-rent analysis.

Evaluates a typed math expression and supports functions such as sqrt, sin, cos and abs.

Works out a percentage of a value, a value as a percentage of another, or percent change.

Knit and crochet helper that suggests size, checks yarn yardage and gauge; no login and works offline.

Converts a knitting swatch into stitch, row and yarn-length estimates for a target size.

Aviation calculator for approach minima, climb gradient, rate of descent and common unit conversions.

Electronics calculators for resistor color codes, Ohm's law, voltage dividers and more.

Converts between bytes, kilobytes, megabytes and larger data units.