Productivity
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Productivity
JWT Decoder: How to Read and Debug a JSON Web Token
Decoding a JWT shows you exactly what it contains — but decoding is not the same as verifying it is genuine, and that distinction matters a lot.
Productivity
Free Hash Generator: What MD5, SHA-1 and SHA-256 Actually Do
A hash is a one-way fingerprint of data — the same input always produces the same hash, but the hash can never be reversed back into the original input.
Productivity
VAT Calculator: How to Add or Remove VAT From a Price
Adding VAT to a price and removing VAT from a price use two different formulas — dividing by the same percentage you multiplied by does not reverse it correctly.
Productivity
Tip Calculator: How Much to Tip and How to Split a Bill Fairly
Splitting a bill and tip between a group correctly involves more steps than dividing the total by the number of people.
Productivity
How to Calculate Percentage, Percentage Change and Percentage Difference
"Percentage of," "percentage change" and "percentage difference" are three different calculations that get mixed up constantly.
Productivity
How to Calculate a Discount and Final Sale Price Instantly
A 30% discount followed by another 20% off is not the same as 50% off — here is how discount math actually works.
Productivity
Mortgage Calculator: How to Estimate Your Monthly Mortgage Payment
A mortgage payment estimate depends on more than the loan amount — down payment size and loan term move the monthly number just as much as the interest rate.
Productivity
Loan EMI Calculator: How to Calculate Your Monthly Loan Payment
Your monthly loan payment depends on three numbers — principal, interest rate and tenure — and small changes to any one of them move the payment more than most borrowers expect.
Productivity
BMI Calculator: How to Calculate Your Body Mass Index (And What the Number Means)
BMI is a quick, widely used health screening number — but the formula and its limitations are worth understanding before you read too much into it.
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