six tools, four of them built separately for the US, UK, Canada, Australia and India

Work & Productivity Tools

The everyday admin tools, without an account, an upload or a watermark on the way out.

Country-specific

Built five times, once per country

Time Card Calculator Weekly hours with the overtime rules of your country. US GPA Calculator 4.0 scale, UK classifications, GPA/WAM or a ten-point CGPA. US Resume Builder Build it locally and export a clean PDF. US Invoice Generator With the right tax fields for your market. US
The same everywhere

One page, no country variants

Date Calculator Days between, business days, age and countdowns. Time Zone Planner Find the overlap without a spreadsheet.

About these tools

The tools in this category share a problem: the free versions elsewhere want your document. An invoice generator that builds the PDF on its server has your client's name, address and the amount you charged. A résumé builder that needs an account has your employment history. Neither needs any of it — the work is entirely arithmetic and layout, and a browser can do both.

So these run locally, produce a real file, and ask for nothing. No account, no email address for the download, and no watermark that only comes off if you subscribe.

The date and time zone tools are here for a different reason: both are full of edge cases that most implementations get wrong. Counting days by subtracting timestamps is off by one on the two days a year the clocks change. Adding a month to the 31st has no clean answer and needs a stated convention. Time zone abbreviations are ambiguous — CST is three different zones — and offsets change when governments decide they do. Those cases are the reason the tools exist rather than a footnote to them.

Questions

What people ask

Do I need an account?

No. Nothing here needs an account, an email address or a sign-up. The tools run in your browser and produce their output there.

Is my invoice or résumé data uploaded?

No. It never leaves your device — this site makes no external requests at all, which you can confirm in your browser's network tab. Client names, addresses, amounts and employment history are exactly the sort of data that should not be handed to a free web tool.

Will there be a watermark?

No. The file the tool produces is the finished file. There is no paid tier that removes something the free one adds.

Why does the date calculator make a point of month arithmetic?

Because "one month after 31 January" has no correct answer, only conventions that disagree by up to three days. The tool clamps to the last day of the target month — what contracts and payroll do — and tells you when it applied that rule, rather than quietly moving your deadline.

Elsewhere on the site

Other categories

PDF Tools Merge, split, compress, edit, sign, convert — all in your browser. Image Tools Resize, compress, convert, crop and fit for every platform. Finance Mortgages, take-home pay and interest, localised per country. Health & Fitness BMI, calories, pace and pregnancy dates. Estimates, not advice. Home & Auto Paint, flooring, fuel, cooking and unit conversion. Generators QR codes, passwords and random picks — generated locally.