Free tools.
Free tools that run in your browser. No sign-up, and nothing you do leaves your computer.
// tools/
Choose a category.
Device testers.
Keyboard, mouse and gamepad tests: every key, button and stick, polling rate, drift and more.
3 tools, web, freeConverters.
Units, currencies and documents. Convert CSV, images and PDFs in your browser.
2 tools, web, freeCalculators.
Percentages and discounts, date differences and age, loan EMI, and BMI.
4 calculators, web, freeUtilities.
Small everyday tools, starting with a QR code generator.
1 tool, web, free// next/
Coming soon.
Network tools (DNS and IP) and developer tools (JSON, Base64 and text) are planned. Each will get its own category hub.
// faq/
Frequently asked questions.
Are these tools free?
Yes. Every tool on this page is free to use, and you do not need to create an account.
Do I need to install anything?
No. Open the tool in a modern web browser such as Chrome, Edge, Firefox or Safari, and it is ready to use.
Are my results private?
The tools run on your device. We do not send what you type, click or convert to our servers, so there is no record of your results on our side.
How accurate is the Universal Converter?
Standard unit conversions use fixed conversion factors, so they are exact to the precision shown. Currency results are only as accurate as the rate you enter, so check it against a current source before making a payment or a decision.
Your privacy
These tools run in your browser. Nothing you type, click or convert is sent to our servers, and we do not ask for your name, email or any account details to use them. Read the privacy policies for the details of what each app and site stores.