Online tools

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Find a percentage, compare two numbers, or calculate a change.

Calculate an exact calendar age, total days, and time to the next birthday.

See how an initial deposit and regular savings could grow over time.

Project the value of fixed monthly investments using a constant return.

Estimate fixed loan payments, total interest, and the effect of extra payments.

Calculate adult body mass index in metric or US customary units.

Count words, visible characters, lines, and paragraphs in pasted text.

Validate JSON syntax and format it with indentation or compact output.

Convert an opaque sRGB color between hexadecimal, RGB, and HSL notation.