Free online tools that work instantly

Count words, calculate age, percentages and profit margin, or change text case. Everything runs in your browser, so nothing is uploaded and there is nothing to sign up for.

Word counter

Paste or type your text

0Words

0Characters

0No spaces

0Sentences

0Min. to read

Age calculator

Date of birth

Percentage calculator

Percent (%)

Of number

Profit margin calculator

Cost price

Selling price

Text case converter

Your text

Why use QuickKit?

QuickKit is a small set of everyday tools without ads in the way, pop-ups or accounts. Each tool does one job, loads fast on slow connections and works on phones. Because the maths and text handling happen on your own device, your writing and your numbers stay private.

Frequently asked questions

Are QuickKit tools really free?

Yes. Every tool is free to use with no signup or limits.

Is my text uploaded anywhere?

No. All tools run inside your browser, so your text and numbers never leave your device.

How is profit margin calculated?

Margin = (selling price − cost) ÷ selling price × 100. Markup divides the profit by cost instead.