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10 FREE BROWSER TOOLS

Everyday calculators

Turn numbers into clear answers. Ten free browser tools with local processing.

Choose your next task

No account required

Percentage calculator

Find a specified percentage of a number with a transparent multiplication.

Age calculator

Count completed years between a birth date and an explicitly selected review date.

Aspect ratio calculator

Reduce two positive dimensions to their simplest width-to-height ratio.

Loan payment estimate

Estimate monthly payments using a fixed rate and term, with a zero-interest calculation when applicable.

Manual-rate currency calculator

Multiply an amount by the exchange rate you enter instead of relying on stale live-rate claims.

Length unit converter

Convert a length between supported metric and imperial units.

UTC to time zone

Show an explicitly offset timestamp in a selected IANA time zone.

Date difference

Count elapsed calendar days between two dates using UTC date boundaries.

Random integers

Generate a bounded list of cryptographically random integers in an inclusive range.

Scientific expression calculator

Evaluate a supported arithmetic expression without executing JavaScript code.

Your files, your device.

Files are processed in your browser. No processing server, account or paid API is required. Device text-to-speech voices may use operating-system network services.