I built a free online toolbox with 260+ tools — here's the tech stack and what I learned

ToolReign is a free online toolbox featuring over 260 utilities across 15 categories, all operating directly within the browser. The platform includes developer tools like JSON formatter and JWT decoder, alongside SEO helpers, image tools, and a finance section. By utilizing Next.js, the creator developed a fast PDF converter to eliminate the need for software installations, storage space, and external uploads, providing a centralized location for tasks that previously required multiple bookmarks and tabs.