ToolBox Blog

Tips, guides, and how-tos for getting the most out of free online tools.

How to Convert JPG to PNG Without Uploading Files

Learn why in-browser image conversion is faster and more private than server-based tools. Step-by-step guide to converting between JPG, PNG, and WebP without uploading your images anywhere.

What is JSON? Format, Validate, and Debug Your Data

JSON is the backbone of modern APIs and configuration files. Learn how to pretty-print, validate, and minify JSON using a free online formatter — and why keeping it client-side matters.

How to Create a QR Code for WiFi, URLs, and More

QR codes are everywhere — from restaurant menus to WiFi sharing. Discover how to generate QR codes for URLs, WiFi credentials, vCards, and more, right from your browser.

How Strong is Your Password? Understanding Password Entropy

What makes a password truly strong? Understand the math behind password entropy, why length matters more than complexity, and how to generate uncrackable passwords.