ToolFoxGuides
Clear, practical explanations to help you get more out of the calculators and tools — and make better decisions with your money and data.
What Is JSON, and How to Read and Format It
A beginner-friendly explanation of JSON: what it is, its syntax rules, the most common errors that break it, and how to format and validate it.
5 min read
Compound Interest, Explained Simply
Why compound interest is called the most powerful force in finance, how the formula works, the Rule of 72, and why starting early beats investing more.
5 min read
GST in India Explained: Rates, and Inclusive vs Exclusive
What GST is, the main rate slabs, the difference between GST-inclusive and GST-exclusive prices, and how to back-calculate the tax from a final price.
5 min read
Old vs New Tax Regime: How to Decide
The new regime has lower rates but almost no deductions; the old one is the opposite. Here is the simple framework for working out which leaves you paying less.
6 min read
SIP vs FD: Which One Builds More Wealth?
A plain-language comparison of systematic investment plans and fixed deposits — returns, risk, taxation and when each one makes sense.
7 min read
How Home Loan EMI Is Calculated in India (2026)
What an EMI actually is, the formula banks use, why early instalments are mostly interest, and how prepayment and tenure change what you pay.
6 min read