Utilities
Small everyday tools: QR codes, passwords, calculators.
What it is for
Here are the tools that fit no particular category but get searched for constantly: generating a QR code, creating a secure password, converting units, breaking down the VAT on an amount or splitting a bill.
What they share is being one-off calculations or generations, the kind resolved in ten seconds if you have the tool at hand and awkward if you do not. Nobody installs an app to work out a tip, yet everyone has needed to do it in a hurry at some point.
Two deserve a mention on security grounds. The password generator uses the browser’s cryptographic generator, the same one professional managers rely on, and the password never leaves your machine. And the QR code this site produces is static: it depends on no intermediary server, so it does not stop working if someone shuts a service down.
Which tool do I need
- I want a QR for a poster or a card
- The QR generator builds the code with the text or link inside it and downloads it as PNG, ready to print.
- I need a password nobody can guess
- The password generator creates one at random with the length and character types you choose. Store it in a manager.
- I have to convert from inches, pounds or Fahrenheit
- The unit converter covers length, weight, temperature and speed, updating as you type.
- I need to break down the VAT on an invoice
- The VAT calculator adds it to a net amount or extracts it from a total, showing the full breakdown.
- There are several of us and the bill needs splitting
- The tip calculator divides the total between diners and works out the tip on the amount.
Frequently asked questions
Is a password generated on a website safe?
This one is, because it is generated with the browser’s cryptographic API on your own machine and never sent to a server. You can generate it with the internet disconnected.
Does the QR code expire?
No. Being static, the text lives inside the code itself and it will work as long as the link it contains stays valid. QR codes from services that let you change the destination do depend on that company staying in business.
Does the VAT calculator work outside Spain?
Yes, the calculation is generic. You only need to enter the tax rate that applies in your case.
Why can VAT not be extracted by subtracting the percentage?
Because the tax was calculated on the net amount, not on the total. To recover the net figure you divide by 1 plus the rate, rather than subtracting the percentage from the final amount.