Free calculators and developer tools. No sign-up, no tracking, works instantly on any device.
easyutils.io is a collection of 26 free, no-sign-up web tools across three groups: calculators for finance, health, and time (loan payments, net salary, VAT, BMI, calories, date math); developer utilities for everyday API work (token counting, JWT decoding, webhook-signature verification, JSON inspection, Base64, cron expressions); and decision helpers that return a clear verdict rather than just numbers (rent vs. buy, installment interest, cost-per-use, job-offer scoring).
Every tool runs entirely in your browser. There are no accounts and no servers processing what you enter — the numbers you type into a calculator or the token you paste into the JWT decoder never leave your device, because the JavaScript does the work locally. That is also why pages keep working offline once they have loaded, and why there is nothing to sign up for.
The goal is to answer one question accurately and show the working. Calculators display the formula they use; decision tools explain how they reached a verdict. The site is free to use and supported by unobtrusive ads — see the privacy policy for how that data is handled, or read the blog for the reasoning behind the tools.