Everyday decision tools
Fast calculators for everyday decisions
Clear results, transparent assumptions, and useful next steps—without the clutter.
Popular tools
Start with the tools people use most.
Compound InterestSee how regular contributions can grow over time.→BMI CalculatorCalculate body mass index and a healthy weight range.→JSON FormatterFormat, validate, and minify JSON safely in your browser.→Loan CalculatorEstimate payments and the total cost of a loan.→Days BetweenCount days between two dates.→Word CounterCount words, characters, and reading time.→
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Small, focused utilities for common questions.
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Finance
Clear calculators for savings, borrowing, income, and everyday money decisions.
Health
Practical health reference tools with transparent assumptions and calm guidance.
Time
Simple tools for dates, durations, and planning your time.
Developer
Fast browser-based utilities for common developer tasks.
Text
Small text utilities for writing, editing, and organizing content.
Latest guides
Straightforward explanations to help you use each tool well.
Finance · July 10, 2026
How compound interest builds over time
A practical guide to contributions, rates, and time.
Read guide →Health · July 8, 2026Understanding BMI and its limits
What this screening measure can and cannot tell you.
Read guide →Developer · July 4, 2026How to format JSON safely
A quick workflow for valid and readable JSON.
Read guide →