67 useful tools · zero sign-upsCalculate. Convert.
Calculate. Convert.
Prepare.
One fast workspace for accurate calculators and files ready for every upload. Your data stays in your browser.
Ready for real uploads
Explore file tools →Popular file tools
Focused workflows, exact output details, and no server upload.
Image to 20KB
Aim for a 20KB image for upload portals while keeping the best practical visual quality.
Resize image
Resize an image to exact pixel dimensions while preserving its aspect ratio when requested.
Resize signature
Resize and compress a scanned signature to the dimensions commonly requested by forms.
Rotate PDF
Rotate every page of a PDF by 90 degrees and download a new copy.
Everyday clarity
Browse 30 live calculators →Popular calculators
MathScientific CalculatorUse a fast standard and scientific calculator for arithmetic, powers, roots and trigonometry. Works privately in your browser. EverydayAge CalculatorCalculate exact age from a date of birth in years, months and days, plus total days and the next birthday countdown. EverydayDate CalculatorFind days between two dates or add and subtract days, weeks, months and years from any calendar date. EverydayTime CalculatorCalculate the duration between two times or add and subtract hours, minutes and seconds with overnight support. MathPercentage CalculatorCalculate a percentage of a number, percentage increase or decrease, and percentage change between two values. MathAverage CalculatorFind the mean, median, mode, range, count and sum for a list of numbers instantly.
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Accurate by design
Transparent formulas, clear requirements and boundary-tested logic.
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Private by default
Files and inputs stay on your device. No accounts and no tracking scripts.
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Fast everywhere
Static pages and small browser tools work well on phones and desktops.