About Smartntools
An independent collection of everyday tools that run in your browser, free and without an account.
What Smartntools is
Smartntools is a set of small, focused utilities — calculators, converters, generators, image tools, editors and date and time helpers — collected in one place so you do not have to keep a folder of bookmarks to a dozen single-purpose sites.
Every tool is free, works without an account, and is available in English, Portuguese, Spanish, French and German.
How the tools work
Almost everything here runs client-side: the calculation, the image processing, the text formatting and the code generation all happen in your browser, on your device. Your inputs are not uploaded, which is both a privacy property and the reason the tools respond instantly.
Two features need a server, and only those two: the currency converter fetches live exchange rates from a public rate provider, and the link shortener stores the URL you submit so the short link can resolve later.
Who builds it
Smartntools is built and maintained as an independent project, not by a company with a support department. That means fixes are shipped as soon as they are found, and it also means you are talking to the person who wrote the tool when you report a problem.
The tools are kept deliberately simple: no signup walls, no watermarks, no upsell to a paid tier, no feature that exists only to collect an email address.
Accuracy and limits
The calculators implement published, standard formulas and each page shows the formula it applies so you can verify the result. That said, they are general-purpose tools: the health calculators are not a medical diagnosis and the financial ones are not financial advice. For decisions that matter, check with a professional.
Found something wrong? Report it and it gets fixed — see the contact page.
Last updated: 15 August 2026